If you see this in IMAX there's only one way to describe it, BIG. No make that HUGE! The effects were amazing, if you're into that sorta thing. The story was exciting but there were one or two times when it seemed to drag. At 2 hours and 40 minutes, you should know what you are getting yourself into. Kids will love it. Action junkies will love it. Even environmentalists will love it. Fans of animation will love it. The acting was very good, but because of the enormity of this film they feel stretched a little thin. Overall, it's definitely worth the money. Treat yourself and see it in IMAX 3D to get the full experience!