Justin B.wrote a review of Shimano XTR M9020 Trail Brakes on June 14, 2016
Familiarity: I've put it through the wringer
So I have been riding XTR brakes for ever. These appear to be faulty or something. I have bled them a 1000 times and the engagement on the brakes moves. It is terribly inconsistent and the piston often don't retrace. Every ride I have to adjust the caliper so they are not rubbing the rotor. Not sure what happened here Shimano.