So far these are great lights. They have several settings to balance brightness with battery life, depending on your needs. They stay put once mounted. After owning several sets of cheap lights over the lights I wanted a brighter-than-usual set — that was still easily to carry around when not in use — and these are perfect.These lights are pretty good and have several different light patterns, but they do not last as long as I would have hoped.I ride most mornings before sunrise and wanted something small, bright and rechargeable. These lights do the job well - they easily last me one week on a charge and are rugged and seem like they will last a long time.So far go good. Light brightness and quality better than I'd expected for the price. Would easily recommend these lights to others who are looking for a low cost, but effective, bike lights option.Using them for mostly daytime riding/ 50/50 road/bike trail. Like the rear alternating light pattern, heard from a fellow rider that its " a nice pattern, not distracting, because they overlap blinking so there is always a led not on, (not strobe).I tried a couple other brands but their charge didn't last near as long , and/or they didn't secure to my bike as well. Very satisfied with these lights for use on my bicycle.They are nearly perfect for commuting at dusk or the late night bike path ride. Great battery life and it's nice they are recharged over USB.This is my 3rd purchase of these bike lights. They are my favorite bike lights. Easy to attach to the bike. Easy USB charge. They have several hours run time and a nice selection of flash modes.