Even having read a review, which pretty much laid out the whole story, I found this movie to be completely riveting. Denzel's performance should qualify for Oscar nomination, and the other actors well cast and excellent.
Not being a huge fan of special effects I was pleasantly surprised that I found this movie to be completely absorbing and entertaining, not to mention incredibly beautiful. Also liked the story line which said something about the need to respect and protect our natural resources whcih are irreplaceable.