You are not going to believe this but after one use on my legs, it has been two weeks and the hair has not grown back yet. I’m a real person. I went very slowly and carefully and I’m tall and overweight and have a lot of flesh so it took a long time to do my legs, but so worth it. Very easy to use. I use on 5 which is the max setting. Apparently, some people can be sensitive to the light and the flash but I do not feel a thing when I use it and do not experience redness.