Rez is the best game I have played in years! Some people say it's too short, but
a) I don't care when the experience is so good.
b) There is TONS of hidden stuff to unlock.
It's impossible to play sitting still because the music draws you in, and a rumble pack is essential. It's like the crazy offspring of Tempest 2K and Panzer Dragoon! Everybody buy a copy if you can find one...
I managed to get hold of the soundtrack too (Rez - A Gamer's Guide...) and it is AWESOME, it has the original mixes of all the tunes from the game. I would thoroughly recommend you all track this disc down!