I actually picked up the quater-inch-to-usb cable last year when the game was released for consoles, for recording purposes. Aaaaaand because it was just cool and fun. When the demo became available on Steam I went ahead and downloaded it right away, because I might as well. I've already done the hard part by getting the peripheral. I only played around with it a little bit before Borderlands 2 started taking over my life, but it was very responsive and set really easy to obtain goals. I know this whole game reeks of the gamification of learning guitar, and honestly I'm not a huge advocate of gamification in general, but for some reason this really started to click for me. I'll probably end up picking up the full copy soon so I can really play around with it and see what kind of music it can really handle.