I think I will write a mor in depth review when Im done with the drum career and when I have tried singing, but so far: five stars.
I un packed the drums today created a John Bonham mimic (Virtual Bonzo) and started out on easy since i heard drums was super hard.
It takes some time to learn but zark it is fun, and i have only played on easy.
But I must say that the game threw a lot more notes in that i expected from this difficulty.
But since it is not by far unplayable this is not a bad move.
For kicks i tried Tom Sawyer by Rush in practicemode on expert, and i got a wooping 60%, and about 1000 wrong hits.  Lots of fun.
If you find yourself at Times Square in the next days, find tghe Virgin Megastore and get your Rockband on!