These are Sin Pickups' take on the Seymour Duncan Slash APH-2 humbuckers only a bit hotter and, in my opinion, they sound fuller.
They are very versatile; with just a turn of your volume knob you can go from metal to blues and beyond. Full volume on the neck pickup with some overdrive immediately takes you into Sweet Child O Mine territory. The bridge pickup has enough bite for metal guys but cleans up very well for other applications.
I have them in three of my guitars and I don't see myself ever using anything else. Thank you, Chris!