Great special effect, nice story line. Why not 5 stars? Should have had some battles between the natives and the corporation to show how bad the place realy was; it was mentioned that the trees form a neural net but no consequence of that was demonstrated; and some oversimplified political statements - why, in 2150, are all the "bad" guys WASPS?
But great side stories (the hammer head beast, the transferance of personality, etc)