For me the final proof came when I put VHII's into my PRS Artist. I had never really liked the guitar through an amp but loved it accoustically. I had picked up a set of original Dragon's for it, but already knew how good BK's were because I had them in 2 guitars already.
The PRS now sounds brilliant - all the tones you can get picking it accoustically come through and more besides. The split positions are very Fenderish sounding and the volume sontrol works (a big difference that all BK's seem to make).
After that experience, my old PRS Standard which I thought had the greatest sound (as did many of my mates), sounded flat - that now has RY's and is sounding great again).
I also have to tell you that Tim makes great bass pickups - he put together a P-Bass for me that is perfect if you love the old 60's Precision sounds.