Got this and 57 plus as an upgrade for my Epi LP. Not very experienced with PAF-style pickups myself, but I can definitely say it gives out a great sound. Plenty of smooth, yet surprisingly bright (when required) tone on tap. I usually like to play around with the volume pots to get different tones out of the guitar, and this pickup offers something special on every setting: lovely cleans and drive sound, does a great job at picking up the dynamics in my playing. My favorite is a bit of gain for that "on the edge of breakup" sound, it really sparkles with character.
One single complaint .. When installed on my LP, it wouldn't quite sit centred in the pickup cavity. The guy who installed it said it was due to the pickup mounts (the little handles beneath it). It might also be due to it not matching my Epi LP cavity, but I've had no such problem with the 57 plus. The result is that the strings and the poles aren't quite aligned ... minor issue though, doesn't seem to affect the sound.