Being a hardcore fan of guitar hero as i am my opinion is this is by far together with guitar hero 3 the best GH game.
Graphics - 10.0 - Even on the Wii I would give this game a 10/10, the band memebers are really detailed, they act as they would in real life, and when you watch them play the song on the screen they play identically as in real life.
Gameplay - 10.0 - Same old fun cool guitar hero gameplay mechanics hit the notes to play the song, but you really feel powerful and that you have accomplished something when playing the drums or other instruments in the hard difficulty.
Soundtrack - 10.0 - This game has all the songs you would come to expect from a Guitar Hero Metallica game, there's Fuel, Master of Puppets, Nothing Else Matters, Enter Sandman, One, Cyanide, Fade To Black, even great songs from other groups make an appeareance like Toxicity from System of A Down.
Price - 10.0 - This game is worth everything and even more is perfect for a hardcore Metallica fan, and a addicted Guitar Hero Player
Overall - 10.0 - I have no complaints for this game, try playing the songs on the hard difficulty that is where it really gets satisfying.