I had this sample for a couple of months and didn't really know what to use it for. Finally I looked it up and saw it could work as a spot treatment for a terrible breakout I had. I'm talking big, swollen, painful underground pimples. I applied it overnight, and they weren't gone the next day but the pain was and they had flattened out and gotten smaller. After a week, they were completely gone with no dark spots or scarring, and no dryness or irritation. SOLD. No product has made this kind of difference for my skin, and I will happily pay the price.