This is probably the best serum I have ever tried. It goes on very nice and smoothly, leaving my face smooth and refreshed, After using it for two weeks, I am seeing a huge difference. My complexion is clearer than ever and my various dark spots have lightened up. I also get rashes periodically and this stuff got the rash to go away within days, which is faster than any other product I have ever tried. I highly recommend this product!