I love these lights. Easy to use, bright, functions exactly as stated. My one gripe is the front light, I find the light that comes back to my eyeballs while riding to be quite annoying, even in the daylight. I solved the issue by placing a small piece of black electrical tape over the top of the light. Problem solved. Hopefully, L&M will solve this issue on the next generation.
These lights were to last run up to 6 hours. About 3 hours into the ride, the taillight was off. The head light lasted 4 hours but disappointed that the more important light did not do well. I have had great experiences with Light and Motion products in the past so to say I was surprised and disappointed is a little understatement. The way it changes and the ease of loading it off and on the bike mount are really great, just wish it would last longer. Last 5 hours and this is an easy 5 star product.