Our son is 7yo and before this alarm he almost never had a dry night, we had to idé diapers. After 10 Days using the alarm he had 8 totally dry nights. From day 11 to 16 he sleeps wo any alarm (thats today) and Has 14 days in a row dry. Fantastic and i who did not trust it at all. Only - i can possibly find, maybe a bit to quiet if you like me hear a little bad, but son woke also did wife.