Plea Agreements and Reasonable Waiver

United States v. Abbadessa (Chinnici), No. 06-2398-cr (2d Cir. Jan. 29, 2007) (found here )

What terms did the plea agreement include such that Second Circuit wrote that "[a]s for his sentence, there is some doubt as to whether the appeal waiver in [the] plea agreement waives his ability to challenge the reasonableness of it"?