We are on the 3rd day of using this necklace and have been very happy with the results. My 21 month old is working on his 2 year molars and has been drooling buckets. After the first day of use, there wasn't much change, but by the second day, he was mostly dry! The only thing I don't like is the fact that he can get it up to his mouth. His head is large, and I thought the length of the necklace would be fine, but it is apparently a little too long.