I have 3 sets of the III pro brakes in service. First pair was installed in Dec.22. 2nd pair June 23, and 3rd set Sept. 23. The first set has been used hard, and I have worn through a set of pads. 2nd and 3rd bikes do not see as many miles and/or adverse conditions. I have never ridden on any other "High end" calipers. but in comparison to my XT calipers on my older FS bike, these work equally, if not slightly better. Perhaps on my next build, I will purchase some Lewis brakes... To date, I have been very pleased with their cost to weight/performance ratio.