So if you look at the ratings on there right now, you can see that lots of critics like X-Men: First Class (87) but not many enjoyed The HangoverPartII (35).
And if critics and (to a lesser extent) audiences felt that The HangoverpartII was basically a warmed-over remake of The Hangover, the promise of both a very different kind of plot and a definitive finale of this particular trilogy arguably compensates for most of the burn out from partII.