According to ESRB, this game contains: Suggestive Themes, Violence
The game is rated Teen, and parents should feel comfortable about letting their teens play it. It's very violent, but it's completely unrealistic and non-imitatable violence, unless your children are exceptionally limber.
Fighting game fans will no doubt have a good time with this game. While it might not rise to the heights of the Tekken or Soul Calibur, it's a fine fighting game, definitely worth checking out.
Deaf and hard of hearing gamers may be annoyed that none of the game's dialogue is subtitled, but since there's such an incredible dearth of plot, they won't actually be missing anything critical to their enjoyment of the game.