My son got this game the other day. I was hoping it had a little more music education in it as opposed to pushing buttons. But, if nothing else, it looks like it'll teach him about
timing in music.
I'll have to admit, I've found myself 'movin to the groove' on many an occation while the boy is playing the game on my system. My home PC is located behind the seating in my HT room. The game being 5.1, and my rears located on either side of my head make for an interesting experience to say the least. Except for the occational sound effect that makes me jump out of my chair.

After a few days he managed to get my wife (kicking and screaming) to play with him. Now keep in mind, the last time she played a video game was ten years ago. She play for over three hours!
WILLINGLY. Turns out she likes it. Who knew?!
She got ripped off a bit since she was using the controller not the guitar.
The funniest part is when he asks me, "Dad, have you ever heard this song?"
"Yes I have..... It was written BEFORE I was born son."
"NO WAY DAD!!!".....Yes son.

I've not played the game, and have no desire to. But overall, watching the boy play it, it seems pretty cool.
Bob