The special effects were great as advertised. However, you may miss some of them when the story puts you to sleep during this 3 hour snoozefest.
The tired story is borrowed from many movies (Dances with Wolves is one) with borrowed lame dialogue ("get some") and others that would make this unwatchable if not for the 3D effects . If you must see it, see it in 3D to come close to getting your money's worth.