Dude, didn't anyone see this? There are no threads I could find about it.
I was quite surprised on watching the DVD--it was awesome!! And I haven't said that about a movie in a while now. One of the best action movies I've seen in a long time. J.J. Abrams went up in my estimation big time. I wish I had seen this in the theater.
The performances are perfect for a MI-type action thriller. The action is kinetic and hyper cool, yet grounded in [movie] realism. (I don't like the real-face masks that are a staple of MI, but I got over that. Otherwise, I never found myself saying "that's stupid" about anything in the movie, which is very rare.)
The emotions feel natural and Maggie Q is super super cute.

Tom Cruise embodies this role like he was born for it. Despite being WACKY in real life, he is so good at looking cool and intense in films like this. I can't usually buy him playing a "regular" guy, like in War of the Worlds--but here he is superb.
I liked it. I don't want to pump it up too much, since admittedly my low expectations played in the film's favor. But I believe I can state rationally that it was a very good movie, and one I enjoyed a lot more than I thought I would. I actually am hoping for MI:IV now.
