This is easily the best of the Guitar Hero games yet. I admit I am slightly biased towards it; being a big Metallica fan, but it's still the best one anyway.
If you've played and conquered the other GH games, then this one is NOT just more of the same. It is a lot harder than the previous games; with more complicated solos, and with the songs being longer you need a bit of stamina in those fingers!!
For me, it was fantastic to get to play some of my favourite songs on Guitar Hero; not just Metallica songs, but 'Demon Cleaner' by Kyuss and 'Blood and Thunder' by Mastodon. It is also disheartening trying to do justice to classics like 'One' and 'Master of Puppets' when they have such hard bits to master... I've only had it three days though!!
Take my word for it; whether you are a Guitar Hero fan, a Metallica fan or even just a bit of a rock/metal fan, get this game and shred away until your fingers are locked up in pain!! It's the best of the Guitar Hero series so far and not just a limp attempt at a way to make money out of a global franchise like Metallica.
Very impressed... buy it!!