This is a great light, really bright, visible from a wide angle it has a long battery life, good weight. Shame then that it has a tendency to escape the mount mid-ride. I've had 2 of these lights, both have gone flying from a bump in the road after a few months of use. When you find the peices, the light itself survives, however the lighter battery cover will have popped off, the batteries gone and inevitably something will have been run over. I've two lights recovered from escaping, in both cases the cover was destroyed by cars. Such a good light completel ruined by a mounting that just isn't up to the job. A £30 light with a £2 mounting, The Cateye front light mount is so good, it's just a shame this great tail light is let down by the mount.