Honestly, I haven't really noticed results after four months, which is disappointing because I had high hopes for the Flasher 2.0. (side note: my first flasher had an error on the screen and customer service was super helpful in sending me a new one!) I've been using the flasher consistently (2-3x per week) on my underarms for over four months now, and can't say I've noticed much of a difference. My underarm hair may have thinned just a little bit, but it is still very much there and I still need to shave every day. I have light skin and brown hair so I thought this would work for me....wanted to try it on my underarms and then move to other areas of my body but it just doesn't seem to be effective :(