If you saw this film in IMAX 3D, then you got the full effect of the film which is why it is the highest grossing film of all time (not adjusted for inflation). It was the first to film entirely with 3D cameras and got the whole modern "3D fad" going. If you simply saw the movie itself, it comes off as a decent film chalk full of CGI. The action sequences were well done. Zoe Saldana was the stand out of the film as Neytiri, one of the indigenous Na'vi. The story itself, however, has been done before. This film is essentially Dances with Wolves or The Last Samurai just in space/on another planet.