Compared to some of the newer ones, GH2 was short, awesome and incredibly addicting.

User Rating: 9 | Guitar Hero II (Game only) X360
I first got this game on PS2 and I found it to be a highly addicting, rewarding experience. It had some great songs, and a cool Co-op mode. Now I borrowed the 360 version from my friend and I find I am hopelessly immersed in the simplistic gameplay.

PROS

+ Great graphics and art style.
+ Pretty sweet song selection
+ Co-op is a very nice addition
+ 10 more songs than the PS2 version.
+ Excellently designed achievements.

CONS

- Some of the cover bands suck.
- Less songs than some of the newer games.
- No online.
- Glitched leader boards.

Seriously, some people have like 999,999,999,999 on Easy or something for a few songs. The gameplay is smooth sailing and the colored circles are very fun to look at. (Weird huh?)
This baby is like, 20 bucks at Gamestop for a whole lot of enjoyment. Highly recomended.