For what it's worth, this game is fun. However, if you don't own a gamepad or XBOX 360 Controller, this game is nigh impossible to play. It took me almost an hour to beat the 3rd battle in story mode, simply because the Keyboard controls are so convoluted and hard to use. That being said, this game assumes you have an XBOX 360 controller plugged in, so all the movement instructions are in the format of ABXY commands (Which, on a Keyboard, are bound to L;PO by default). Good luck trying to figure out where the RT and LT buttons are. It took a lot of getting used to to play this properly, and the controls cause my hands to become quite cramped after a relatively short gaming session (about 30 minutes).
The game itself, graphics, story, voice acting, characters and whatnot, are excellent, the models are well made and the attack animations are great. There are characters that are clearly overpowered, such as Bijuu mode Naruto and Deidara, as well as those that are severely underpowered, like Konan, but that's to be expected in a game set in the Naruto Universe.
All in all I'd give this game a 7/10, if you're playing with a keyboard.
If you have a controller or a gamepad, I'd give it an 8.5/10.