I needed a plug and play solution for broken brakes on my wife's Rad. This was perfect solution. The brakes installed perfectly, pads have great shopping power, quiet and overall great build quality. There is no way I could have repaired her old brakes for same money and I would have so had old brakes. I would absolutely use these for serious mtb. They are up to the task. The only issue I see is the short cable for rear. Enclosed pics are showing them installed on a small, 20" frame. The cable is perfect but not long enough for a large frame. These are definitely worth the upgrade over mechanical brakes and definitely get the rotors too. Hardware is good quality as well. If anything of note develops once they’re bled and out on the trails, I’ll be sure to update this review.