We have tried the demo game, and I think it is great. My son, age 9, takes taekwondo, and he practices his moves with this game. It is neat to see him on the screen. I was concerned about the violence, but I think it is "cartoony" enough not to be a problem. The one mild bad word in the beginning narration is not that big of a deal if your kids understand not to repeat it. The exercise that my kids get through this game is well-worth any potential negative effect from the comic book style violence or very mild language.