I'm not ever quick to rate ANYTHING a maximum rating because, typically, there are shortcomings with virtually anything that's ever assessed/appraised/rated. I honestly didn't see a single aspect of this movie that would have caused me to subtract from a maximum review rating though, and that is a rare feat for a movie to achieve with me.
The only complaint I DID have was against the actual IMAX THEATRE I saw the movie in, and NOT the movie itself (had to do with 3D glasses being re-used multiple times between multiple movie-goers and the inadequate/non-existant cleaning between those multiple uses), but this had NOTHING really to do with the movie itself (which, I reiterate, was completely 5 star!).