I was dubious about trying out the new iTunes 8 feature, because I have tried music recommending programs and they have rarely worked. They were kind of like: If you like Mariah, try Whitney. That was too basic for me and I wanted each track to be separate from the other. This genius bar on iTunes works perfectly and has filled most of he missing holes in my library. It works by tracks and gives great recommendations. It is works by accumulating the databases of its customers to generate accurate results. Try it.