Don't believe all the hype. As a guitarist I played this game for about 10 minutes and then went back to my guitar.
Another down side to this game is that even tho there are over 100 chords to chose from, that doesn't include / chords such as D/F#, G/B, A/C# etc. Which eliminates A LOT of songs you would be able to play. As well as rules out the possibility of really writing any songs using this.
For those of you out there who don't play guitar at all and want to pick up this game, don't. It will very likely turn you off to music because it just gives you some sounds to mess around with. If you really wanna play guitar, save your 30 bucks, get about 30 - 80 more. go to a guitar store and just buy a cheap guitar. so much more fulfilling than this game. You can bet as soon as Zelda comes out i'll be trading this game in for that. What a waste of 30 bucks.
HOWEVER I do feel obligated to say some good stuff. They do a good job getting the sound of an acoustic guitar. they did give options of effects to play around with. They did a heck of a job advertising for it... uhm... yeah. The game still feels like it was in the middle of its developmental stage when they released it.