I've used it for just over 3 weeks and I can say my skin looks better than it has in a very long time [SEP] This might be worthy of 5 stars but I don't know yet. I've used it for just over 3 weeks and I can say my skin looks better than it has in a very long time. It would seem that this tiny bottle will last for 5-6 months so it is economical as well. I've used prescription retinoids which also helped my skin but I had to be quite careful with them as they can make my skin very dry and flaky if I don't dilute them with moisturizer or use less frequently.  This product doesn't seem to have that affect at all. I do still use a retinoid in conjunction with this. It comes with instructions and you simply wash your face and then apply this prior to any moisturizer or retinoid. Love it, it was a good buy.