Its not worth the extra hassle or money to see this in IMAX, since its not really IMAX. Its more like a larger than normal screen, but not close to the size of IMAX. I saw it an AMC that claimed to have an IMAX, but I think they're just abusing the name.
Other than that, the movie was still visually really cool. Story and soundtrack could have used more attention, but worth a see.