Ok, not great.
I got this game as a fan of the T.V. series not expecting a great deal of exciting game play, and that was pretty much what I got.
There is a lot of detail in the levels and one of the good points about the game is that you can swing the camera around your character 360 degrees but controlling your character with the DS control pad takes some getting used too.
The main bad point about the game is that it gets boring as you will die a lot and this means that you will need to backtrack and with low health it can be hard.
Fans of Aang will get some pleasure out of it when you kick Fire Nation ass but it will take you a long time.