I have previously used the Azaelic acid and had great results. I started suffering from breakouts and decided to try Azaelic Acid again but rather stupidly from other brands...when I seemed to be getting nowhere I thought I would go back to what I know works and ordered again from Face Theory. I have only been using it again now for 5 days but already there is a massive improvement. Can not recommend the product enough. I also can not fault the customer service. The delivery company "lost" my parcel and on emailing Face Theory , they replied straight away and I had a new delivery virtually the next day plus they had put a couple of extra bottles in which I was not expecting. It seems that at last we have a company who actually does care about their customers.