Several individuals have written about the excellent success they have had with their DIY kits. This is in contrast to the disingenuous
real or imagined stories from individuals who own or work at bike shops and extol the virtues of OEM. The following two bikes are around six years old and have never had a problem. I ride the red one off road a couple of times a week and the green Diamondback is for errands. The friend that rides off road with me has worn out a Bosch system (he sold it cheap) and his Brose-equipped Bulls is in the shop now since it cuts out on hills.