Opening stages are a bit slow, but everything else rocks just fine.
Much of the selections are classic rock and metal. Fine by me. Still, I would also like to see a bit more old-school alternative-- this many games in, and still no chance to take a hack at the solos in "Shoplifters of the World" or "Monkey Gone to Heaven." You can't have everything, though.
I love a game that's just fun. I think Guitar Hero has made people a lot more interested in playing music, and that's an added benefit.
This is a perfect party game.