I am writing this review on the basis of one ride of 6 km up a meandering and often steep mountain road in Himachal Pradesh at night. The full intensity beam which I used was very adequate for the ride, and more than bright enough. I could have used it on a lower setting but did not as I wanted to check how long the battery lasted on full beam. The spread of light was also good with a more concentrated beam at the centre and more diffused towards the sides. I also like the fact that it has three intensity settings and also one strobe and one SOS settings (though I don't think I will need to use the last two.)
I kept the light on continuously during the climb and there after and it lasted for over 2 hours, but did become very dim towards the end.
I thought something was wrong after I charged it as only one side of the rectangular button glowed green. But the system is that one end of the button glows green when the battery is fully charged. There after as the battery discharges the centre of the button starts glowing orange and thereafter the other end of the button turns red to indicate that the battery is low. Even after the red light comes on, the light continuous to work for quite some time, giving adequate notice of battery discharge.
On the negative side, the plastic parts for attachment seem to be made out of some rather cheap plastic. Also, when I received it, it had marks on the paint as if it had been handled and was a display piece, which did not feel good. The box mentioned that one could press the button to test the light intensity, but when I did that the light did not come on at all, as the battery was discharged. This also gave me the feeling that it was a display piece which was sent to me. Of course, I don't know whether in fact it was or not.
Overall I am pleased with the performance of this light as of now.