Super addicting and leaves you want more of a lot of things.
I began on easy, as everyone should, but realized it was too easy. So, medium came, then hard, then before I knew it, I was playing "Black Magic Woman" on expert. So now that i have a good grasp of the game, I think I can now say somethings I liked about the game and somethings that could be added or improved.
The guitar controller is probably the funniest controller i have ever used. You can actually use it on other games, but its is HIGHLY IMPRACTICALLY. (star power=throw grenade in Gears of War :-P) I think that the difficulty levels are prefectly balanced, although some songs are harder then expected.("Same Old Song and Dance"???WTF???) The song selection is great, and the ability to go online to the XBox Live Marketplace and buy songs as well. So, overall it is a great game.
There are only a few things that I wish the game had( and Guitar Hero 4 has already fulfilled them!) First, i wanted more songs!!! You can only play the same songs so many times. And really the only other thing i wanted was to be able to make your own songs. I thought that would be great to do because i have so many songs i want to play!
So, Guitar Hero III is a great game, a great buy, and if you can wait til Oct. 21, 2008, Guitar Hero IV will be out and it will blow your mind!!!!!