1) they really bring out the good things about your playing, and they really dont hide the bad things about your playing...(ie...its time woodshed like no tommorow), I got a few sets as my signature would imply and all of these are so musically different, although right now the Mules might just be my favorite ones...
2) They are each thier own individual monster...Seymour duncans and Dimarzios are the only two after market pickups that I've had experience with and to an extent, they all sounded pretty much the same to me, with the exception being purely the guitar that they were in. With the Bareknuckles that I've got, each has its own sound along with its own character, they react to harmonics and different picking techniques and clean up differently from one another.
3) They fricken rock, everyone that I play with has been able to tell the difference between the old tones I was coaxing out of my guitars and the new ones...cheers tim