Great quality, great performance
I don't have a ton of reference regarding disc brakes, but I upgraded to these from Avid Elixir 1's. Night and day difference. The Avid rear brake howled no matter what. These are silent. These are easier to bleed and don't use corrosive fluid like the Avids did. You can adjust the reach on these levers without tools. I like the shorty levers too, they encourage one finger braking, and you definitely only need one finger to operate these. These have great rating here, on MTBR and the guys at the LBS raved about them. You can spend a lot more or a little less, but everyone loves these brakes.