First use was for upper lip hair removal and the outcome was as expected! Hair is starting to grow back in after a week to two weeks. Will probably nair again before too long. Second use was on armpit hair, and the result was disastrous. About 3-5 minutes after application, I washed off and was disappointed to see that maybe half the hair had been removed. I applied again and suffered a great burning sensation. Over 24 hours after and my armpits still hurt due to what seems to be chemical burns.
DON'T USE BACK TO BACK.