Appeal from a judgment of the County Court of Rensselaer County (McGrath, J.), entered December 21, 2004, convicting defendant upon his plea of guilty of the crimes of attempted murder in the second degree (three counts) and reckless endangerment in the first degree (six counts).
Mercure, J.On this appeal from a conviction by guilty plea, defendant seeks to preserve that portion of his plea agreement which favors him while at the same time disavowing that portion with which he is dissatisfied, namely the agreed-upon length of his sentence. In short, he seeks a reduction of his negotiated sentence but does not request vacatur of the plea and remittal *911for a trial. Because defendant validly waived his right to appeal in connection with the plea, however, appellate review of his sentence has been foreclosed, as explained below.
In February 2004, defendant, who was 16 years old, wrote a suicide note and then took a loaded shotgun into the local high school that he had previously attended. After entering a bathroom and waiting for approximately 15 minutes, defendant used his cell phone to send text messages to his friends informing them that he was in the school with a gun and warning them to leave. A few minutes later, while exiting the bathroom, defendant encountered Eric Farrell, a student. Defendant pointed the shotgun at Farrell, who ran into an open classroom. At that point, defendant saw two other students, Jeffrey Kinary and Kristopher Steponik, in the hall outside the bathroom. Kinary made eye contact with defendant, who pointed the shotgun directly at him and pulled the trigger. Kinary, who dropped to the ground as he saw a flash of fire from the barrel of the gun, was not hit. After Kinary and Steponik heard a second shot being chambered and attempted to run and crawl away, defendant fired at them again and the wadding of the shotgun round struck Steponik in the leg. Defendant then entered a classroom with the gun but was pulled back out by Assistant Principal John Sawchuck, who attempted to wrestle the shotgun away from him. As a teacher, Michael Bennett, approached to assist Sawchuck, defendant swung around and the gun went off, striking Bennett in the leg. At Sawchuck’s urging, defendant then agreed to give up the shotgun. Defendant was arrested and transported to the Rensselaer County Jail, where he was observed that night laughing at television news of the incident.
Defendant was subsequently charged in an indictment with three counts of attempted murder in the second degree, one count of assault in the second degree, and 82 counts of reckless endangerment in the first degree. In satisfaction of the indictment, he pleaded guilty to three counts of attempted murder in the second degree and six counts of reckless endangerment in the first degree. As part of the plea bargain, defendant agreed to waive his right to appeal. The terms of the plea agreement specifically provided that defendant would receive an aggregate prison term of 20 years, to be followed by a five-year period of postrelease supervision. Although County Court imposed the agreed-upon sentence, defendant now appeals, arguing that his *912appeal waiver was not valid and that his sentence should be reduced in the interest of justice.1
It is well settled that absent a valid appeal waiver, “[t]his court is vested with discretion to review the sentence imposed upon a defendant, even where the sentence was given as part of a negotiated plea,” and to reduce the sentence if warranted in the interest of justice (People v Mackey, 136 AD2d 780, 780 [1988], lv denied 71 NY2d 899 [1988]; see People v Thompson, 60 NY2d 513, 519-520 [1983]; People v Gibbs, 280 AD2d 698, 699 [2001], lv denied 96 NY2d 829 [2001]; see also People v Smith, 32 AD3d 553, 554 [2006]). Nevertheless, “|w]hile the Appellate Division may be divested of its unique interest-of-justice jurisdiction only by constitutional amendment (see People v Pollenz, 67 NY2d 264, 267-268 [1986]), a defendant is free to relinquish the right to invoke that authority and indeed does so by validly waiving the right to appeal” (People v Lopez, 6 NY3d 248, 255 [2006]; see People v Seaberg, 74 NY2d 1, 8-10 [1989]). A valid appeal waiver will not foreclose review of issues that go to the integrity of the process, such as challenges to the legality of a sentence, the voluntariness of the plea, or a defendant’s competency—challenges that are not advanced herein; it will, however, foreclose an argument that a legal sentence is excessive (see People v Lopez, 6 NY3d at 255-256; People v Seaberg, 74 NY2d at 9-10). As the Court of Appeals has explained, to the extent that “[t]he right to appeal a validly imposed sentence . . . implicate^] society’s interest in the integrity of the criminal process, . . . that interest is protected by the procedural and substantive requirements imposed on the Trial Judge before the defendant may be sentenced” (People v Seaberg, 74 NY2d at 9).
The Court of Appeals has also long rejected the argument that appeal waivers interfere with the exercise of interest of justice jurisdiction by the Appellate Division. Specifically, “[a] defendant’s decision to waive appeal does not interfere with the court’s jurisdiction . . . ; it is simply a decision not to invoke the court’s review power. By pleading guilty[,] a defendant forecloses the appellate court from reviewing the merits of the plea bargain in the interest of justice and there is nothing inherently wrong in a defendant similarly electing to foreclose review *913of a negotiated sentence” (id. at 9-10 [emphasis added]). That is, “a bargained-for waiver of the right to appeal . . . does not operate to deprive the appellate court of its jurisdiction of the appeal. Instead, it merely forecloses appellate review of all claims that might be raised on appeal, except, of course, those categories of claims that survive such waivers under our case law” (People v Callahan, 80 NY2d 273, 285 [1992] [emphasis added]).2
Indeed, upholding a defendant’s election to foreclose discretionary review of a negotiated sentence serves an important public interest concern. “The important goals of fairness and finality in criminal matters are accomplished only insofar as the parties are confident that the carefully orchestrated bargain of an agreed-upon sentence will not be disturbed as a discretionary matter” (People v Lopez, 6 NY3d at 256 [internal quotation marks and citations omitted]; see People v Seaberg, 74 NY2d at 10). Thus, “[a] defendant may not subsequently eviscerate that bargain by asking an appellate court to reduce the sentence in the interest of justice—realistically an issue that as a practical matter is brought to an appellate court’s attention only when raised by defendants” (People v Lopez, 6 NY3d at 255-256 [emphasis added]). In our view, that bargain is similarly eviscerated, contrary to the well-established public policy of this state, when an appellate court purports to honor a defendant’s waiver by rejecting a challenge to the excessiveness of a sentence as *914barred by an appeal waiver, but then reduces the sentence—just as requested—and deems the reduction to be “sua sponte.”3
Turning to the waiver at issue here, after “considering all the relevant facts and circumstances surrounding the waiver, including the nature and terms of the agreement and. the age, experience and background of the accused” (People v Seaberg, 74 NY2d at 11), we conclude that defendant knowingly, intelligently and voluntarily waived his right to appeal. A review of the plea colloquy reveals that County Court initially explained the terms of this particular plea, including that defendant was waiving his right to appeal, and elicited the agreement of both defendant and his counsel that they understood the terms of the plea to be as the court had recited. Contrary to defendant’s argument, the court thereafter “describ[ed] the nature of the right being waived without lumping that right into the panoply of trial rights automatically forfeited upon pleading guilty and elicit[ed an] agreement ] of understanding from . . . defendant” (People v Lopez, 6 NY3d at 257).
Even assuming that County Court’s discussion was inadequate, however, defendant signed a written appeal waiver in open court at sentencing, acknowledging that he had consulted with counsel regarding the waiver and that counsel had advised him of all the legal ramifications of the waiver (see People v Ramos, 7 NY3d 737, 738 [2006]). Although defendant asserts that County Court should have elicited his express acknowledgment on the record that he had, in fact, signed the waiver and done so with full understanding and awareness of its contents, such an inquiry was not required in light of the execution of the waiver in open court—which would have necessarily familiarized the court with the circumstances surrounding the waiver’s execution (cf. People v Callahan, 80 NY2d at 283). Furthermore, defense counsel, who signed the waiver as á witness and continues to represent defendant in connection with this appeal, does not dispute the accuracy of the written waiver’s state*915ment that it was made in open court and, despite the dissent’s misgivings about counsel’s ability to explain the right, defendant does not claim that counsel’s advice regarding his right to appeal was in any way deficient or inadequate (see People v Fludd, 33 AD3d 1124, 1125 [2006]; People v Greene, 7 AD3d 923, 923 [2004], lv denied 3 NY3d 659 [2004]; cf. People v Edwards, 37 AD3d 871, 872 [2007], lv denied 8 NY3d 945 [2007]). Given the undisputed facts that the written waiver was executed in open court and there was a record discussion, albeit brief, of the waiver with defendant by the court, it cannot be said, as in People v Callahan (80 NY2d at 283)—a case in which there was no indication that the court was even aware of the waiver—that we have been presented with a “silent record” preventing any determination of the waiver’s validity.
Finally, while defendant argues that his waiver should be deemed involuntary due to his youth, history of mental illness and use of the medication Paxil—which he claims causes impaired judgment and serious emotional side effects—at the time of the plea,4 we note that counsel did not raise any concerns regarding defendant’s competency at that time or move to vacate the plea thereafter on the ground that defendant was not capable of understanding the proceedings (see generally People v Bagley, 34 AD3d 992, 993 [2006], lv denied 8 NY3d 878 [2007]; People v D’Adamo, 281 AD2d 751, 753 [2001]). Nor did defendant’s responses to County Court’s inquiries regarding the impact of the Paxil medication on his thinking and ability to understand the proceedings give any indication that he was “uninformed, confused or incompetent” during the plea colloquy (People v Alexander, 97 NY2d 482, 486 [2002]; see People v Williams, 35 AD3d 971, 972 [2006], lv denied 8 NY3d 928 [2007]). More fundamentally, defendant’s argument that his mental illness, medication and youth rendered him incapable of understanding the appeal waiver would apply with equal force to the guilty plea in its entirety, yet he provides us with no explanation for his decision to challenge just one term of the plea bargain in this regard—the appeal waiver—as opposed to the voluntariness of the plea as a whole. Given the circumstances under which this particular plea and waiver were *916entered, it is both disingenuous and legally inconsistent to argue that defendant’s youth, inexperience and psychological condition were such that he was unable to understand that he was waiving his right to appeal without also arguing that these same facts precluded a voluntary plea in the first instance.
In sum, we conclude that defendant validly waived his right to appeal and, thus, his claims regarding the severity of his sentence are precluded (see People v Ramos, 7 NY3d at 738; People v Lopez, 6 NY3d at 256-257; People v Collier, 35 AD3d 1037, 1037 [2006]; People v Nason, 31 AD3d 818, 819 [2006], lv denied 7 NY3d 869 [2006]; cf. People v Cain, 29 AD3d 1157, 1157 [2006]).
Crew III, Peters and Carpinello, JJ., concur.
. Although we do not reach the question of whether this sentence was harsh and excessive, we note that it was significantly less than the 75-year maximum sentence that could have been imposed upon the attempted murder convictions (see Penal Law § 70.02 [3])—crimes defendant continues to freely admit to committing. It was also less than a sentence recently affirmed by this Court based upon similar conduct and in the face of nearly identical claims (People v Bonelli, 41 AD3d 972, 974 [2007]).
. As the quoted language illustrates, the dissent’s expressed concern over language in our decision “suggest[ing] that any action on the part of a defendant . . . can work to restrict the Appellate Division in the exercise of [the] authority” to reduce unjust sentences is more properly directed at the Court of Appeals decisions in People v Seaberg (supra) and People v Callahan (supra). While this Court had previously declined to adopt the dissent’s views regarding a defendant’s ability to foreclose our review of negotiated sentences (compare People v Maye, 143 AD2d 483, 484 [1988], lv denied 73 NY2d 788 [1988], with People v Bourne, 139 AD2d 210, 214-215 [1988], lv denied 72 NY2d 955 [1988]), the Court of Appeals definitively resolved the issue in People v Seaberg (74 NY2d at 9-10 [rejecting Bourne]), a case that is nearly two decades old and that was reaffirmed just last year in People v Lopez (6 NY3d at 255-256). Of course, even if we do not agree with the rules of law set forth in the decisions of the Court of Appeals, we are bound to follow those rules (see e.g. Albany County Indus. Dev. Agency v Gastinger Ries Walker Architects, 144 AD2d 891, 893 [1988], appeal dismissed 73 NY2d 1010 [1989], lv denied 74 NY2d 605 [1989]; Bull v Stichman, 273 App Div 311, 316 [1948], affd 298 NY 516 [1948]; Scott v King, 51 App Div 619 [1900]). Thus, to the extent that any of our decisions may have failed to recognize that a valid appeal waiver “foreclose^] review of a negotiated sentence” (People v Seaberg, 74 NY2d at 10; see e.g. People v Coleman, 281 AD2d 653 [2001]), those decisions should no longer be followed.
. Such an action on our part would, of course, also reflect a fundamental misunderstanding of the term “sua sponte,” which is defined as “[w]ithout prompting or suggestion; on its own motion” (Black’s Law Dictionary 1464 [8th ed 2004]). Reduction of defendant’s sentence in the interest of justice, as requested, would not be “without prompting or suggestion”; rather, it would be an action taken upon defendant’s appeal, not “on [our] own motion,” regardless of whether we claimed to be upholding the appeal waiver or not. In any event and as explained above, the Court of Appeals has repeatedly held that the Appellate Division does not have the power to reduce a defendant’s sentence under such circumstances in stating that a valid, bargained-for waiver of the right to appeal “foreclose[s] review of a negotiated sentence” (People v Seaberg, 74 NY2d at 10).
. Despite the extensive list of medications prescribed to defendant that is set forth in the dissent, we reiterate that, at the time of the plea, defendant was taking only the medication Paxil. Inasmuch as there is not even a suggestion in this record that the additional prescription medications that he may have taken in the past had any impact on his ability to understand the consequences of his waiver during the relevant time period, the prior “inadequate[ ] or improper[ ] manage [ment]” of defendant’s illness perceived by the dissent is simply irrelevant to the issues before us on this appeal.