Matrix meets Alien meets Last of the Mohicans. Really cool movie, special effects not overdone. Don't go for the intricate storyline, just go to enjoy some excellent filmmaking. IMAX sound is awesome, no hearing aids required.
I love 3D and IMAX, but after the first 10 mins it was a pretty lousy movie. The storyline is very amateurish and they just banked that 3D and IMAX would make up for it.
Kids under 10 won't get the innuendo and it is really quite loud, in an annoying way. I loved BOLT in 3D, and if that was 3 stars, this is at best 2 (out of 5). The early effects are superb, but after that you will be disappointed.