Saw this earlier in the summer, agree with what others have said. Really entertaining, great action and a lot of legitimately "laugh out loud" funny moments.
However, yes, the ending is a bit confusing and a I think a cop out. I get the idea of wanting the shining happy ending, but IMO if thats what they were going for they could have done it in a way that did not seem to violate some of the rules setup earlier in the film.
But still a really good flick. Tom Cruise is a basket case in really life but that guy can carry a movie like very few actors. Very rare that I come away not liking one of his movies. The only exceptions are when he has tried too hard to make a deep film with a shallow premise (Vanilla Sky, Eyes Wide Shut).
