I only have about 10 miles of use so I'm a bit limited on details. Pads still need a bit of breaking in but I did get a few hard pulls in. Stopping power is so much more pronounced but it's not grabby. I'm not even sure what pads are in it...could be organic but even if they are I can live with them. Feels linear, the more you squeeze the lever the harder it bites...stock setup had very little initial braking & squeezing the lever harder didn't do anything. The caliper has a pair of 27mm pistons. With the 11mm master cylinder it gives a 12:1 ratio, which is what I shoot for on single disc setups. It's almost exactly the same ratio using the same master cylinder with the stock caliper but way more stopping power.
EDIT: Pads bedded. Did about 10 stops from 50mph, about a minute apart, progressing from light to heavy braking each time. The last one was a hard squeeze, emergency stop. It's almost violent how hard it grabs now. No fade at all. I've got a 1/2" master that I'm considering putting on. That would give me a 9:1 ratio, stiffen up the lever pull & would still be better than stock (7.4:1). Caliper has Bikemaster pads but I don't know if they are sintered or organic. Next thing that needs to be done is stiffer springs. It's very nearly bottoming.