I am using this on ALL my “parts” and can definitely tell a slowing in regrowth. I’m still in the initial phase, needing it 3x weekly, but notice I do not have to shave nearly as often. The ONLY time I’ve experienced pain is on an area that is not completely shaven. Other than that- nothing. I use it on the highest setting. I have fair skin and am using on dark hair in tougher areas, as well as under arms. So far I am very pleased and the price-point is a huge win.