By far one of the best brake kits I've ever bought. I tow trailers with and without electric brakes and trust me when I say they work 100x better than factory brakes. I followed the break-in procedure as directed and noticed a big difference in pedal and braking travel. I installed them myself and made sure all parts on the calipers and caliper brackets were properly cleaned and lubricated. I gave 4 stars for durability because I've only ridden them about 5,000 miles so far. Time will tell if they make 30,000-40,000 miles. FYI I paid a few bucks less for them than the best chain brakes for my 17 Ram 1500.