If you haven't already, you can read my review.
I saw it a second time last night and didn't care for it quite as much as I did before - on non-Imax, some of the effects look cheesier, and there's not a lot of subtlety to notice on repeat viewings. It's all about moving the basic story forward, which is fine. That's the kind of movie it is, and contrary to popular belief, some reviewers can accept that.
Now it's your turn. Once you've seen the movie - or if you haven't and don't care about spoilers - sound off in comments below!