Sound: I put this in my strat during my conversion to a H-S-S (technically H-S-H, with the DiMarzio chopper in the neck). The pickup is amazing sounding, producing searing metal tones, with tight palm mutes and pinch harmonics. The tone is massive, especially after I put on a set of .11 string on the strat. The sound clean is surprisingly bluesy sound, with funk or even country sound great using it.
Quality: The build quality is great, with the adjustable pole-pieces allowing you to tailor how each string reacts through the pickup, giving you the ability to really fine tune your tone. No hum through the pickup due to bad electronics, and everything tightly secured together, this little baby isn't falling apart any time soon.
Overall I am amazed by this pickup. I really need to hand it to the techs over at DiMarzio and Mark Morton for crafting a great pickup.