This is my second rear light, the first one liked the ride so much it stayed out on the road somewhere. I have the matching front light also. I think having daytime running lights helps with safety and having the lights there and automatically turning on is good. Seems to be a good technology. My prior light was the "Pro" version, I liked the way that one fit on my bike better. The Pro version sticks out straight versus this version which hangs down. The rear light especially has a long run time.
There are so many taillights on the market with a wide range in pricing for sure. I ran across this company by chance about a year ago and was impressed with the advertisement and thought, what the heck! I have been pleasantly happy ever since. In fact so much, I ordered the matching front headlight to compliment my Madone on my road rides for frontal visibility. The charge on these last a very long time. In fact I may get 6 rides on the lights and they are still working but I recharge them anyway. If you want a great light for visibility and not dump $100 plus for a simple light.....this is the ticket!
This is my second Light and Motion Vya Light. Earlier I owned a set and they played out in two years, so insufficient life as far as I am concerned. I bought this light as a replacement rather than two to see how it holds up.
I am a fair weather rider and like the visibility that this light provided. Until it rained on one of my rides and water seeped past the o-ring and soaked the circuit board. The circuit board sheered off when I removed it from the mount. This product would be much better if they put an actual USB connector on it rather than having the bare circuit board be the connector.
I reviewed a different Light and Motion taillight, and it has major issues. Im happy to report that this light is an improved design, and works as described. It lasts up to 7-8 hours, is super bright, and easy to recharge. Fits under your seatsaddlebag, and just works.