I have had this lamp for a year, and cannot recommend it. Two issues with it: weird light beam pattern and low battery life.
Light from LED is reflected with a mirror, and the created pattern has a wide and strong horizontal spot and a area-filling area. But the contrast between these two illuminated areas is very high, it looks very strange and confuses when I ride.
The battery life from a nominally 3000 mAh accumulator is much shorter than achievable from systems with similar capacity and power consumption that I have. And it was not good from the start, i.e. it is unlikely to be caused by the lamp age (~1 year now).
I would avoid using this lamp for any serious application. Short slow commutes - maybe yes, but nothing beyond that.