As far as the "fun factor" goes with this game, I'd have to say that it's right on par with being just as much fun as Guitar Hero 2.
The game gets blisteringly fast when you're playing Endurance Mode, and you approach 400 beats per minute in the song... doesn't it, Larry?
All things considered, I think it was worth the 800 point download... it's a
really fun game to play.