I have pale skin and dark, fast growing hair. I would say I have a medium pain tolerance. I was a little nervous the first time I used it, but I use it on the highest setting and really it only feels mildly uncomfortable at worst, or like a small rubber band snapping. I've done my legs, underarms, and bikini area. 8 weeks in, other than a few stray hairs my legs are completely hairless and I have no need to shave between treatments.