>>>I like my Opticube, it's mounted on my helmet, great attention getter, it is NOT a headlight<<<

The only thing good about the Opticube is the light. Putting the batteries inside is like solving the Rubics cube. To make matters worse, the light kills batteries real quick if you don't remove them. I really hate the straps that go around the handlebar as you have to spend major time adjusting it.

Other than the light, the whole device was poorly engineered.