The new color scheme makes it harder to see precisely when to hit notes during the 'dreamscape' levels.
I'm no beginner to the drums on Rock Band, but for some reason I was having random notes just not register a hit. I've never had the problem on RB 1 & 2. And yes, I did calibrate my drum set.
Also, the Dreamscapes look great.... a little too great. They become very distracting and it ends up being a chore to focus on the highway (Which seems a bit shorter).
None of those gripes prevented me from 5 staring every song and challenge, but it was a bit irritating having my multiplier knocked down to 0/x2 just because it didn't register.
There's good fun to be had with this game, also the photos and videos you unlock are nice little trophies. But the game is SHORT. It's only around 40 - 45 songs.
So my advice to you is that if you have to play it now, just rent it. Otherwise wait until it drops in price. It's a great game, but not worth the $60 price tag. If you see this game for $30 then I say go for it, otherwise it's well over priced.
I'm a heavy Beatles fan, but at times I got tired of hearing them. Too much of a good thing can ruin you. So after I played this game for 2 hours, I ended up popping in RB2 just to get some variety.
Also, the songs aren't exportable which is a big disappointment for me. I would rather have them be playable in RB2 even though it doesn't have the harmony mechanic.
Unless you're coo coo for The Beatles, this game will get old quickly. I don't mean that as an insult to the group, I grew up listening to them. Maybe it's simply because the game lacked a lot of my favorite tracks like "Maxwell's Silver Hammer" or "Strawberry Fields" It's just something about this game makes it go stale after your initial playthrough, unless you're coo coo for achievements.