I believe the reviews i read claimed the movie had pacing problems at the beginning and was too stereotypical an example of Campbell's hero's journey.
The stereotypical thing might be true, but i'm always a sucker for simple hero's journey stories so i didn't mind. They certainly spent awhile setting up up the story before jumping into the main action, but i would not have termed it as a pacing problem.
So in any case i quite enjoyed the movie and think everyone should go see it, though it wouldn't hurt to skim some negative reviews first :)
(Also, why don't i have any generic dragon userpics?)