Having studied martial arts as well as the history of ninjustu, I have to say I was somewhat disappointed with this movie. Hollywood seems to think they have to be as extreme and shocking as possible to keep people's attention these days. This is not true. We don't need limbs flying and bodies cut in half and gallons of blood to be entertained. What happened to the days of movies telling a story and letting that captivate an audience? The movie was still enjoyable as a whole, but I felt the unrealistic weaponry and excess blood and gore definitely detracted from the movie. Next time let the story and the actors be the spotlight!