Bought it, I enjoy learning how to use the new guitar controller. Still have problems telling if a chord is black/white or white/black, and when a song quickly alternates between black and white notes, I'm helpless. That's a problem I need to solve though.
They screwed up on the design for hammer-on and pull-offs. They shine blue, but so do the notes that "give" star power, how the hell can you tell if there are HO/POs or not? Baffling design. I also don't like how so many songs have "2-1" or "3-1" chords when you're clearly hearing a power chord (thus should be 1-2 or 1-3). I don't get why they're so frequent, much more abundant than 1-2 or 1-3 on the "hard" difficulty level.
Finally, I must say that they royally fucked up the whole "live" side of things. Nevermind having to wait a minute to play your song, or how the video constantly switches from "good" to "bad" when things get tough. Or having major cognitive dissidence when a guy who clearly isn't Eminem is singing exactly like Eminem. My biggest problem is:
WHY THE FUCK IS EVERYONE STARING AT ME ALL THE TIME!?!?
Seriously, for some songs, the drummer, guitarist, singer, roadie, fucking everyone is just constantly staring at you. It's unnerving, it's like it's the invasion of the body snatchers, and they know that I'm still a regular human. The whole idea was to "simulate" playing a concert. I've never been to a concert where every member of the band is staring down the guitarist the whole time. You know the crowd is over there right? The ones that paid money to see us? Maybe you should look at the crowd a bit?