Story: If you liked Dances with Wolves you'll like this. The story is reasonably solid and will keep you engaged. This is not a kids film. Weaver was a great surprise but Ribisi has a small roll that doesn't stretch his abilities.
Tech: Real3D: Cameron didn't over use the 3D which was great. Too often it is fatiguing on the eyes because it's artificially TOO 3D. As Vistavision was to movies in the 50's to counteract TV, Real3D is that special "something" that compels you get off the couch and go out and pay $12 to see it "better". DigitalCinema is projected at 24 frames-per-second. In 3D that's only 12 frames per eye. So it can get "strobe'y"