The 3D effect we had already seen years ago in Imax. Agreed the graphics were terrific and real beauty was achieved on occasions. The editing was good. But there the list of merits ends, definitively. There was not a trace of realism in any of the major dynamics. It was Tom and Jerry physics. The plot made the Simpsons look like a masterclass in universal philosophy. Narrative dated or absurd. Useless as instruction for the young, pointless for the mature. What an incredible waste of technology. The incoherence of the key characters, an impossible mix of capability and incompetence, intelligence and a level of idiocy that would have disqualified them all from participation in any organized enterprise on terra firma let alone space. The forest people were OK, possible, but even then.... I had better stop. I can forgive Cameron, its the reviews here that depress me. Means Cameron is spot on with his estimate of the audience.