The whole premise for this movie is cool. The old legends were true--there WERE dragons back in Midieval days. They also killed the dinosaurs, brought on the ice age with their ash, and starved themselves into hibernation. Then one day some engineers dug too deep (as engineers always do in these kinds of movies) and the whole world went to pot.
Cool concept, huh? Too bad there wasn't much beyond that. I was ready and rarin' for lots of action, but there was very little, and it was sporadic and not even that great. The plot is okay, not very original, and was pretty entertaining for one viewing. I don't know if I could sit through it again, though.
In short, this is one of those movies that looked really cool but proved to be a let-down. My advice? Watch it once (if you like this kind of movie) before you decide to buy. I know I won't be owning this one.