If you like music games and rock n' roll, then you would enjoy this game a lot. It's a lot of fun. I was disappointed in the 2 player because it's just the 2 of you taking turns playing the same track, and it splits you between the 2 stereo channels. It was still fun, but I was expecting more.
Guitar Hero 2 looks like it *does* give you more, you can actually choose a different track on the same song (like bass instead of lead guitar) and play at the same time as the other person. Looking forward to that one.