We saw this in a full-size 3-D IMAX . The CGI was awesome, and the 3D effects were very well done -- I actually felt as if I were an Pandora.
The story line was predictable, but the graphics kept things from getting boring. The acting was so-so.
The science was terrible. "Unobtanium" -- give me a break. That was the punch-line of a joke from the 50's. Pandora is supposed to be low gravity, but things fell at the same speed that they do on earth.