Wow, that's an awesome review. Definately the best one I've seen on Wii Music. I'm actually pretty interested in this game now :D
I guess I had been brainwashed by all the Wii Music haters, but this made me look closer at it, and after also browsing Youtube, I have to say that this game looks pretty interesting.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS