I saw this over the weekend and thought it was awesome. A pretty good follow up to both The Avengers and Iron Man 2. I did have one problem with it though.
(spoilers): The Mandarin. They made the Mandarin in the trailers and the first half of the movie to be this awesome badass that's gonna be a huge threat to Tony, then it is reveled that he's just a drunk British dude while Guy Pearce's character is the "real Mandarin". I didn't like the twist very much, but it didn't stop me from liking the movie, and it shows how good of an actor Ben Kingsley is. (end spoilers).
Overall, very good movie. Interesting plot, introdcues the Extremis which Marvel head Kevin Feige says will return, and opens Phase Two of the Marvel Cinematic Universe nicely.
What did you guys think?