D.B.
I've done it many times. I think the best thing is to wear older underwear (lest you get an wax on good panties), and be prepared for some redness and even bruising. I sometimes get bruising (maybe once or twice) although not everyone does. Don't do it the day before you want to be in a bathing suit - give it a few days for the redness to disappear. I also think it's important to give the esthetician a good idea of where you want the line to be - go a little higher than you think you need. Just go to a good salon that does a lot of it.