Ds3 aged 14 is going to have it at the dentist. Dentist said it's great and everyone gets really happy and giggly on it. She also said it's the same as the gas and air you get in labour. I had gas and air for 3 of my births but don't remember being giggly or happy, just little waves of temporary relief of pain. But maybe it feels different when you're having a tooth taken out instead of a baby!