It may be awhile before you can find some good demo.. If I read the promo right it can be use on a PC with the newer OS. The promo video was rather lame.. Reviews were good.

http://store.apple.com/us/product/HA153LL/A/squier-by-fender-usb-stratocaster-guitar

It would fit my practice situation, but I not on the market for a new guitar.
Good luck on your research..

All the youtube videos that I tried were the same... You may want to ry them for there remarks..