What is the test for reasonableness review when a defendant asserts that his sentence is too lenient?

Appellant also asserts that his sentence is substantively unreasonable. We vacate a sentence for substantive unreasonableness "only in exceptional cases where the trial court's decision cannot be located within the range of permissible decisions." Cavera, 550 F.3d at 189. We do not use substantive reasonableness review as "an opportunity for tinkering with sentences [we] disagree with," because "we place great trust in sentencing courts." United States v. Dorvee, 616 F.3d 174, 183 (2d Cir. 2010).