I LOVE this product! I have two auto immune issues and these devices we all use are total germ magnets! Our department recently purchased a few of these for our high school, and I use this machine twice a day at minimum. Our whole department is using it to stay healthier. Even my brother who is skeptical scientist, examined it and explained UV light is used to clean lab areas after a work day is completed. I truly feel this product works and is not a gimmick. Especially useful during flu season, or for people with compromised immunity or people with small children running around the house! It is a must have!