I have dark hair, but now the hair that does grow back is already thinner and lighter. It's totally pain free, The most you'll feel is something similar to a hot rubber band snapping you, but it's not bad and only happens if you do level 6. The SR function is exceeded expectations! I've only been using it for about to one month, my skin is super soft after I use it, it also helps prevent razor bumps after I shave. Would highly recommend!