I love the GH franchise but unless there's some amazing new shit I don't see a reason to buy this game because the setlist is pretty lame imo.
Does party mode sound interesting to you? Works like a jukebox, keeps the music rolling non stop and anyone can hop in or out playing along at any time on any difficulty setting with any instrument.
You can also play any combination of instruments in the regular modes which is a very welcome change IMO. Bass in GH grates on my nerves big time. I know it it far more like playing a bass then what they do in RB, but I loathe the strums(reason why I always stuck to guitar in RL instead of the bass too

).
The new challenges are a welcome addition too. You can get up to 9 stars per song now, the first five work as normal- if you complete a song perfect you get 6 stars, then each song has a challenge where you can get up to an additional 3 stars. Challenges are like, alternate strums for every note, whammy on sustains for as much time as possible, maintain a certain multiplier or hit a certain score(lots of others, just giving some examples). Really make replaying some of the songs fairly interesting.
did anyone realize the selection of songs...are less than stellar... i mean, you end up playing the synth part in du hast. did we run out of guitar based songs?
Heh, thought this was amusing as my wife was psyched that DuHast was on there(your point is completely valid, my wife is German and a big Rammstein fan). You certainly have a valid point, but they do have a few decent guitar songs in the game, plus those you can import from WT(why hasn't anyone done 'The Audience is Listening' on any of these games yet? side tangent but still, got on a rant about that the other day and it's still pissing me off

).