I've been looking for an affordable serum that can help me with some pigmentation and brighten the complexion. So far this has been working great. I noticed a difference right away with the brightening of the skin. In terms of the pigmentation, I have not noticed anything immediate but those dark spots take time. Overall a great serum for the price and did not give me any issues after trying it for several days. My skin is normal to combination and not sensitive so I cannot speak to those with sensitive skin.