This movie is fantastic if you are the type of person who gets a kick out of people jumping out of shadows, disemboweling their enemies, and splashing blood all over the place.
If that sounds terrible to you, it also sounded terrible to my wife... who also loved the movie! Just go into it hoping to have fun and see some over the top violence and fight scenes and you'll be happy. Don't try to analyze the plot or look for the best movie of all time. I'd recommend going to see it with a bunch of buddies who are nuttier than you are and after getting a few drinks in ya.