The first night I used the Anti-Acne Serum, I was a bit concerned that I might experience a negative or unfavorable reaction. But, just the opposite happened. The next morning all of my whiteheads were drained and the big red bumps were dulled down to almost no redness. After 3 days, I could actually see my face. It is without a doubt one of the best cures for adult acne. If you have oily skin in the summer and dry skin in the winter, but you have slightly sensitive skin, then this is the product for you. It does not dry your skin. Just a dab on each of your pimples or problem areas (you do not need to rub in) every night and in the morning and you are good to go. After you apply let dry and then you can apply facial cream and makeup if you choose. I love Bye Bye Blemish Anti-Acne Serum. It's the cure for me. For me, the product is 5 out of 5.