Great movie, terrific CGI. Easy to get immersed in this new world, completely believable. At some point the big blue aliens begin to look familiar and don't seem strange at all. The storyline is fairly simple and repeats some elements of other past movies dealing with oppression and exploitation but the environmental message is on target. I am somewhat of a tough guy and even I almost cried at the end of it. Very smart and very well done. My teenage son said it was the best movie he ever saw and for me it was not quite that good but still very good nonetheless.