I have to agree with a previous review - I was overly impressed with the eye-popping visual effects, especially considering my expectations were so high. As I suspected, however, the plot was extremely simple and focused too much on a "us vs. them" theme that is all-too often used in movies that emphasis the environment and the evil industrialized nations.
My suggestion? Turn off your brain, throw on the dorky 3-D glasses, and enjoy some eye candy. Just don't expect to feel like you ate a full "meal."