Perfect light output for the size. Mount is good and easy to use. The built-in clip works great with jersey pockets and the rear of saddle bags. Charges fast. Lasts several 1.5 hour rides before re-charging when using flashing mode.
Purchased to use on bike helmets (my wife and I). Have had numerous comments from car drivers on how visible we are and how much they appreciate the additional visibility. Terrific product. Btw, we also use garmin varia.