Pros: Best 3d film i have ever been to. Everything looked in focus and any effects that were obviously 3d were not over done (like objects flying at your face just to make you fall back in your chair).
The character development of the Navi was done well. I felt more connected to them than i did the humans. which strangely made me feel quite conflicted after the movie was over.
Cons: The "save the planet" theme was laid on way too thick and the mining corporation people seemed very 1 dimentional in their manic quest to collect the unobtanium.