To date, we have purchased over 40 of these. Initially we bought 6 as a test run. We live in the countryside in the Pacific Northwest. Our goal was to have motion activated light at night on the pathways throughout our acreage for those times we walk outside to close in livestock and as a bit of added security for uninvited intruders. These are perfect for us. We use the #3 setting. The (very sensitive) detector activates bright light which stays on for about 15 seconds, then shuts off (saving battery). More movement sets it back off. We can now walk front to back without turning on a flashlight. And when inside, if a light goes on, we can see what set it off through the window.We were especially impressed with how quickly these recharge. It is winter here so most days are cloudly and we were worried they would not charge very quickly. But I went outside at 5a.m. and every light I walked near went on! We have a long driveway. When we pull in at night, every light sets off as we approach.The ONE downside we have encountered is that if we get a lot of wind at night w a storm, if a light is hanging near a branch or plant, the movement will set it off. Doesn't hurt anything, but something to be aware of.Out of 47-ish lights, only one didn't work. Penny for penny, this is worth it. Side note: we hung our lights using zip ties or nails which I recommend as opposed to the sticky tabs they include.