I played this at a friends house this passed weekend, and we had an insane amount of fun. So much so that I was going to pick the game up myself. Then I started doing some reseach on it because $170 for one game is a hefty price tag. I have to say I'm severelly disappointed by the song list. There's not that many tracks considering the price tag, and the songs that are there aren't all that great either. I always heard that Rock Band blew Guitar Hero away in the song department, but to my taste it's the total opposite.
To top that off, I've been hearing nothing but nightmare stories of how easily the guitars break, and that some drums are breaking as well. Then, I checked out the downloadable content to see if there were anymore songs I could get into, and once again it is very limited. Where's some Mastodon or AC/DC.... hell I could go on and on about the stuff I would like to see in this game.
I guess I'll just wait for an price drop, and by then hopefully there will be better song packs for download, and the hardware will be more durable. Right now though I can easily see why this game isn't selling what the buzz said it would.