I also tried a Vis 360 and returned it. I really love the idea but feel like it isn't executed to perfection. First, the taillight doesn't seem as bright as advertised. I placed it side-by-side with a Planet Bike Superflash and it seemed no brighter. I also didn't like the way it mounted to my helmet, although I am sure that is a challenge since helmets vary quite a bit in design. Finally, it didn't hold a charge nearly as long as advertised, which was the biggest reason why I returned it. My commute is 2+ hours round trip, and I was having to charge it after each leg, which is a pain.

On the plus side, I loved the headlight on the Vis 360. It was much brighter than I expected, easy to adjust and really gets drivers' attention.