I really wanted to love this serum, but I have problems incorporating it into my routine because it doesn't layer well (it bunches up and rolls off the skin when I apply creams or my foundation over it). You're supposed to use a vitamin C serum in the morning because it helps your SPF, but this doesn't layer well under any SPF or cream that I have, which is super disappointing. I don't know if the product itself is bad or if it works as a brightening serum because I have difficulty incorporating it into my routine, the formula just doesn't seem to work well with other steps in my routine.