Just got back from seeing it here in Shanghai with a sold-out theatre. I suspect it'll do pretty well here.
Anyways, I enjoyed the movie. Thought the acting overall was really good, though I agree the lead is a bit dry. Really liked the sister character. Hope she returns in future movies. The villains were both very good too. Main villain was strong and the guy who played Golem in LOTR was a great character.
Not my favourite of all Marvel movies, but definitely worth the watch. Whoever did the sound for the movie did a great job too.