Action was good and creative, but it felt like a Spy Kids movie with gay jokes (which were funny). If you were (are) a gamer and like fighting games, you'll get a kick out of the references.
I'm a "character vs story" guy and this movie had little character development and a pretty shallow story line. But I've never read the gr. novel so there's no connection for me. As a movie on it's own, it was meh.