I bought 3 of these hats as Christmas presents for my husband and 2 sons. My husband and 1 son used them a couple of days after getting them. My husband had to fix a broken taillight on his car at night. Too much jockeying of cars to get it in the garage, so he just popped the hat on and it gave him plenty of light to get the job done. My son actually had his car in the garage doing some work under the hood, but the hood blocked the overhead light. The hat provided the light he needed. Both love them and keep them in their cars for emergencies. Charging was easy, just popped it in the USB port on our laptop. The only reason I did not give it 5 stars is that the light is only held in by the flap of the hat. Comes out pretty easily. Would be better if they had a slot or something to slide the light into. But other than that great purchase !