I'm a history geek so I enjoyed the movie (regardless of inaccuracies). I think I would have liked it more if I wasn't a fan of the book because you go in expecting that and this movie really didn't share any aspects with it.
It just felt like it was missing something, there were some plot holes and jumping around. I hope when this is released they also release a Director's Cut. It reminded me of Kingdom of Heaven, the general release was ok but missing something. The Director's Cut filled in those gaps and made it a whole new movie. I think that is what this movie needs.