Purchased this for my granddaughter for Christmas. My sister had gotten my son one 2.5 years ago and my husband and I loved it! People asked if it works. Our response was that we weren’t willing to take it off to find out one way or the other lol. We did notice it didn’t seem to be effective at bedtime unless we put it near him. But anything’s worth a shot when your baby is teething and screaming in pain. Especially if it’s natural and non-harmful!