The movie was ok. Not sure I'd consider it a rental, though, I don't think its worth paying to see in a theater. Jackie Earl Haley steals the movie, its great to see him get another solid role after making a bit of a career comeback in Little Women. Buddy of mind tells me he is in Scorsese's next film, which is great news. Anyway, the special effects are bad and the makeup is even worse. The rest of the acting, for the most part, is pretty mediocre, and you really don't get much emotion out of the climax.
How they let the clown who did 300 get his hands on this material, I just do not know. I think the movie pays a heavy price for it.