I never got into it but it was popular with Limp Bizkit, Korn and others. I've kind of taken an interest lately 'cause I hooked up with a couple rapper friends recently and one has a home studio. I recorded some riffs and melodies for him and was amazed with what he did with them. Other than using a few riffs he took little things like samples of a pinch harmonic or a pick slide and threw them in repetitively on top of a beat. Pretty cool I must say. I'll try to post it soon.