These lights arrived quickly and were as expected. The build quality is okay, the bag is heavy and solid. The light is brighter than I expected, which is good. However, the instructions that come with the flashlights are not well written and a bit confusing. I still have unanswered questions, such as how to save lighting settings on power cycle. Does the light have 48 channels? For what? Especially if you can't save the settings. I'm also a bit confused with groups, although I found that if you set two lights to the same channel and one light's group controls the other, all parameter changes are applied to one light. If anyone would like to shed some light on my confusion about channels and storage settings, please feel free to do so. Also, I'm not sure the customer service/and/or warranty on these lights is second to none, so be weary. 2/3 of the emails from the website came back to me undelivered. For your health