I agree the script was weak, ending weaker. Liked the story line but the anachronisms drove me a little crazy. Can't see 13th or 14th Century Knights saying "let's get the hell out of here" or "just like cockroaches."
Still, I thought Nick Cage and Ron Perlman did a good job. Thought Claire Foy was outstanding, showing excellent range of emotion and absolutely haunting facial expressions.
Not a great film or epic story but not a total waste of time, especially if you're just looking to be entertained.