never heard one with my own ears, but i think the point of that pickup is to fvck up the input stages of an amp to get more filth, in which case it probly wont sound very nice (im not saying thats a bad thing!) when played into a clean amp. and i think matt bellamy out of muse uses em a lot, with the kent armstrong hotrails, which i use, n its a beast of a pickup! kinda silky i guess, but quite loud, and clanky (in a good way) when played hard.
hope that helps!