I am a bit disappointed after 20 minutes of playing it. 
The setlist really isn't my thing but there are a couple of new elements, which is always nice. 
But let's be honest, GH 3 is the best of the GH series :P 
 
(Lately I seem to prefer rock band over guitar hero, but it could just be cause I liked beatles rock band so much)

I officially graduated from uni! \o/