I’ve had mine for two years and is my only light. I have the endurance battery and get 4.5 hours on full. Pretty reliable, although mine developed a slightly loose connection but that was fixed quick and easy. The only negative thing i have is when used as a helmet light only, it flattens out the trail with all that white light – depth perception goes all to pot. Its seen torrential Dusk till Dawn races, regular weekly night rides and everything in between. Lovely light.