A.B.
My friend used one for her daughter at the age of 8. It worked like a charm. She was really impressed and said even though it was expensive, it was worth it in the cost of pull ups, ruined mattresses, and her daughters dignity. She will use it for her son in the next year or so, he's 7. I wouldn't suggest it for children under the age of 5. Without success it will only frustrate the child more. kids under 5 are often afraid to get up out of bed to go, or aren't able to really allow their minds to focus on trying to stay dry to avoid the "buzz".