I've been using this serum for about three weeks now, along with Sunday...

I've been using this serum for about three weeks now, along with Sunday Riley's Good Genes. I use these two every morning, and sometimes I don't even need moisturizer. This serum is beautifully hydrating. During the summer months, I can get away with using the serums, and then a sunscreen (Drunk Elephant Umbra is very good). I've seen more improvement in my complexion using these combination of serums then I have with any other product(s) in my 43 years. I've seen an improvement in texture, in radiance, and in age spots and pigmentation. I haven't finished using the bottle, which is dark brown glass, so I don't know if the serum will lose its efficacy before I'm finished with the bottle. I do appreciate the pump.