didn't work at all
i was using the liquid solution and applied it twice a day for more than a month along with erasul cleanser (sulfur soap). i would say i have just wasted my money with this product coz there was absolutely NO IMPROVEMENT AT ALL!!! true it is that you will need a lot of damn patience but man! its been hell of a month!!! my derm just told me to switch to erythromycin which i think is pretty much the same thing with it. so yeah overall it never cleared up my acne and it even made it worse. but it doesnt mean that it wont work for you just because it didnt work for my skin. just give it a try if by all means youre frustrated. the decision is yours after all.