Ninja Gaiden pumps out continuous action from start to finish, and never lets up. The fighting is lightning fast and the touch controls are responsive. 411 loved every minute of it. The graphics are top notch for the DS, and even some of their anti Nintendo friends loved this game.
The only real downsides are that it is a bit too short and too easy for most of the gaming crowd and that some gamers will find that they can get away with scribbling away on the touch screen like a madman. The game may be easy, but it's no pushover. Take the game, and enjoy it start to finish.