From the opening number on this album, this is all accuistic. Which isn't really a bad thing. But their a punk band. Now you might feel confused. Just listen to one of the songs on this album beyond 'Waiting', and 'Minority', and they'll all be accuistic. It does give GD a whole new sound, like all of their albums always do in one way or another. One of the points of the album Billie Joe Armstrong tried desperately to point out was that "I like accuistics, you can't hide behind them, they have nothing to prove" the biggest hit so far with Billie behind accuistic is the ballad "Good Riddance (Time Of Your Life)" found on their previous album, Nimrod. But Warning stands out amongst their other albums as sound goes, with the accuistic hooks and the experimental, almost Italian sound of 'Misery', another song that proves GD will never do the same song over and over again. Billie's guitar that he used in just about all of their previous albums, 'Blue', is in semi retirement "We tried putting a new fret-board on the thing, and it was so hard-their's barely any fingerboard left" Giving Billie Joe to experiment with other instruments, and giving GD the chance to sound more and more mature and different. Anyone who hates GD reading this has to deal with it-Green Day could be around for years. And their fans will be there. So will their hardcore sound.