I'll begin by saying the film is AWESOMELY BEAUTIFUL. Bar none, probably the best looking CGI I've ever seen in a film since Final Fantasy: The Spiritis Within.
That being said, the movie is empty. It's the same old story with Cameron. 1 to 2 hours of boring set up and the 'BAM!', some of the best action you'll see inside of 45 minutes. I fell asleep about an hour into the film PRAYING to the Na'vi Goddess that it would end soon.
Once you get past the beauty of the film, you'll realize you didn't really ingest much. And yes, I would recommend seeing it for the visuals...not because it's some 'GREAT' film.