Well I just got back from the movie, and I was very impressed with it. It was Ben Stiller's first directing role since Zoolander, which was fantastic, and he did a great job with TT.
I don't want to give a full summary of the movie here - you can find better ones out there on actual movie sites - but there were some hilariously memorable moments & characters.
By itself, the movie is making a huge spoof of not only past war movies -Platoon, Apocalypse Now- but the entire movie genre, but it's so much more than that. It's an war action comedy, with some pretty intense scenes.
Preceding the movie are some fake movie trailers featuring the characters in TT, so if you go see the movie, make sure you get there beforehand so you don't miss the trailers. They're simply awesome, especially the one featuring Ben Stiller.
The only part I thought was kind of stupid was:
Some groups have called for boycotts of the movie, for both Robert Downey Jr.'s portrayal of a black man (blackfacing), and the use of the word "r-tard" many times, but I hardly saw either as overly offensive or mean-spirited. In fact, I found RDJ was one of the funniest parts of the movie.
I didn't stop smiling from the fake trailers to the end credits.
I don't know about any of you, but I usually have trouble laughing out loud in theaters when not many other people in there with me, but I can't count the number of times it happened during this movie. I highly recommend it, unless you're easily offended or don't like quasi-violent movies.