Unbelievably awesome. Go out and buy it NOW!
The reason I didn't give this thing a perfect 10 out of 10 is the fact that many of the coolest stuff is also the hardest to find. If you aren't curious enough to just monkey around with it, the "Funtography Guide" (not a typo) has a two-page flowchart for navigating it.
If you can find a working one, snatch it up as quickly as possible. You get a retro-tastic digital camera, several fun minigames, and a pretty robust DJ music-making tool. What else could you possibly want?