Trial & error for laser hair removal. I order the package the pays for 5+ treatments (for 1 location) at once. First time, is to gauge what setting. It was too low initially. Then on other visits I had some burn marks show up. If you shave before you go in they can't really tell where your hair begins and ends so sometimes they end up zapping you where there was never any hair in the first place, which in return causes new hair to grow in places where hair wasn't previously located, Sigh....Once they get it right though, if you have the patience and temperament, they are good to go. The prices are some of the best that I've seen. Clean office settings, lovely techs, and receptionist.