I have one for 2 years for commuting (Paris / Suburb), on road with traffic or trail far from any light. In city, I use wide beam to avoid to glare other bikes, and switch to long beam when crossing cars (remote button on handlebar). In trail, it depends on my speed. More often on level 1 or 2, sometime to maximum (level 4) at high speed to see farther. Very comfortable to have the time before shut down, 15h at level 1 after 2 years of daily use. The metal case permits to keep it cool, even in summer, compared to the other plastic light of my son (same power, other brand). Window is in glass, so no scratch, perfectly clear. Screw are visible, it might be possible to replace the battery, later. The only weak point from my point of view, is the lake of flashing mode, to use it during the day. Now I am waiting for the rear version in red, to keep car at safe distance. I place a order for my wife.