Hellz yeah, I bought it. Things I noticed:
1: The create-a-character looks like it'll be even more boner-inducing than Rock Band's.
2: One dude basically says "YA I H8ED IT HOW IN ROK BAND DA BAND WERLD TOR WUD MEK U HAV 2 PLEY DA SEM 3 SONGZ OVER N OVER I NEVER WONT 2 HER NERVAN OR WEZIR EVAR AGEN". The odds of Nirvana and Weezer being in the GH4 have decreased by
2%.
3: YOU CAN MAKE YOUR ENTIRE BAND GLAM METAL-STYLE!