I just purchased the TRIAs a week and a half ago and used it as as soon as I received it. It's been about a week and 3 days and the place on my chest there are a few hairs coming out when I use an exfoliating scrub in the shower. I'm so excited I hope sooo bad they never grow back.... so far I have used the TRIA on my chest,lower back, butt, and abdomen. The directions say it takes at least 2 weeks for the hairs to fall out but the really fast growing ones on my chest have already begun so i'm excited. As far as the other body parts I will let you know in approx. a week.