Love them. My favorites are the 58/15s, 85/15s, 57/08s, 408s, and the late, lamented 53/10s (long since unobtainium).
All great pickups. The 58/15s have more clarity and split a little better than the 57/08s; they have more bite than the 53/10s and similar clarity; they are closer to the 408s than the 57/08s IMHO. The 85/15s sound similar, but are a little hotter because they don't have covers (this according to Paul Smith and I agree).
I have all of the above except the 53/10s, but have had a set of 53/10s on an SC58 in the recent past.
The 57/08s are still amazing pickups and among my favorites, too, with a little less clarity, but a bit fatter tone and to my ears, a little more vintage sound (as I define vintage sound, which we all know, varies from player to player, my reference being the 'buckers Gibson was making around 1965 and yes I know they're supposed to be 1958 era pickups; and yeah, that's going mostly by faulty memory, but it's a sound I grew up with and think I remember well).
Whatcha think of yours?