I watched it in IMAX. A long and tiring movie. Wearing the 3D glasses and watching so many things happening were fun for the first 30 minutes...then I wanted it finish fast as time dreaded on. I took the glasses off during some scenes to check on how it looked like w/o it, not all shots were made in 3D.
Plot was like a scientific version of "Dancing with Wolves"...all expected! Watching a production like this is worth once in a life time, no more!!! I actually felt dizzy and wanted to throw up after walking out!!! However, for the length and production budget, you will get your money worth...otherwise...I am not sure if it is good for small kids either...they may think different though...