Perry Hallwrote a review of SRAM Guide RSC Disc Brake on March 30, 2015
Familiarity: I've put it through the wringer
I wrote a detailed review on the XO trail brakes when they came out after riding them, and they were by far my favorite brakes I had ridden in quite some time. I then received a set of Guide RSC's and was blown away even more. The same caliper drives the same power you are used to, with a very much improved lever and cylinder, improving lever feel and modulation as well as power. I just bought a 2nd set for my new bike and won't be turning back to anything else. After riding XT's in the desert on a demo all week, the SRAM brakes still work best for me.