... The light is really great! It has two brightness levels, 10 and 40 lux and 40 lux are really great, the road is well lit and it has the pleasant side effect that pedestrians walking on the bike path make the same place when they suddenly from behind with light " be flooded ". I have the light now for over 5 years in use and buy now again, although it is broken. What I find really good: - As already mentioned, the brightness is beyond any doubt. - The mount can be attached to the handlebar easily and without tools and has held long good at mir'5 years. The mechanism to remove the light is convenient, easy to use and always worked perfectly for me. - The switch must be kept longer, so the light goes on. How often do I have before my batteries wasted because the light has illuminated my backpack from the inside! - I bought the kit with batteries and charger, which is comfortable, because you have to just plug the cable for charging. The mechanism of the battery compartment is actually not so great, so I would advise to the charging cable. And so to the points that are not so great: - The decision to bring the battery compartment where the holder sits, I think is unfavorable. So needless forces act on an unstable place and when the tray ausleiert first time, so it can easily lead to contact losses. And then comes the next weak spot light: The acclaimed me switching mechanism switches off completely when it is short-energized. So it does not come about to short glitches, but the lights go out completely and only needs to be turned on again. But as I said: In my lamp was all of 5 years no problem until it has fallen out of his hand and the complete stairs. Now namely the door hinge was damaged and had to be glued. After that it no longer was stuck right and the mentioned problems occurred. After the lights went still, despite the fairly hard fall, and because I've always been totally satisfied with the light, good 4 star.