I have seen this movie twice--regular 3D and IMAX 3D. Of course IMAX was incredible, but I have to say I was so WOW'd the first go around that I wanted to see it again and went to IMAX. This film is overall one of the best experiences I have ever had in the theater. My only disappointment is that some people I talked to think it is a pure science fiction film, and I have yet to convince them to see it even though I am absolutely breathless when I describe what I saw. They think something's wrong with me!!!!!