If you like Rock music you WILL love this.
Firstly the soundtrack, It has music from the 1960's - 2007. There's Iron maiden, Metallica, Killers, Sex pistols, Guns 'n' roses, Muse and Red hot chili's to name a very few. With over 70+ songs and some free songs off xbox live marketplace this is the biggest soundtrack out of the previous 2. Also is the hardest song on the game which is Through fire and flames by the almighty Dragonforce which is a challenge even on easy!
Some problems are to do with xbox live, as even on high speed broadband there can be some delay before you play. But if you dont play online/ dont bother with it, this is not a problem. Also Battle mode online can be totally unfair as you can play as easy and beat an Expert easily as it all depends on how many notes you hit.
There's new characters including the ledgend G'n'R guitarist Slash, The devil manager Lou, The god of rock, and Rage against the machine's Tom morrelo. There is not many new guitars except for slashes, Toms and a few custom made ones. Theres a few new venues including, hell, A prison, A japanese stadium and many small bars and arenas.
There is a brand new guitar based on the gibson les pauls. It feels alot chunkier and less flimsy then the previous X-plorer and SG. Its all Wireless and you need 2 AA batteries to play. Or you can pay £10 pounds or around 15 dollers for a rechargable pack but its proberly not worth it.
This game is a great game for guitar hero 2 veterans althought this may be a little too tough for beginners, But theres always time to learn...right?
It all comes down to this very simple question, Are you willing to pay £70/$100 for a game?... I think so!