I thought it was a very good movie, but also a huge missed opportunity. I agree with the critics - the film could stand to lose a solid 20 minutes and has huge pacing problems, in spite of being good....it could've been excellent.

Also, I hate IMAX 3D. The screen gets darker and smaller for a cheap gimmick. I prefer plain old IMAX, like the way the Dark Knight films came out - it's much more cinematic and retains a sense of enormous scale.