This product is fantastic, I can't praise it enough! My doctor recommended it to me for my acne, however he did state that you should only put the product on the actual spots not smear it all over your face as it really does dry your skin, which is what it's meant to do, it dries up the spot, thus getting rid of it very quickly. I have been using it for about 9 years now and still find it as good as ever. I found it to be most effective when your spot is in it's red painful stage, I put the product on and by the next day my spots have shrivelled! Also I frequently put it on under my make-up. It doesn't effect the look at all.