I've been using this serum every other night since the beginning of January, and I can honestly say that it works! Hyperpigmentation and dullness are my two major skin concerns, and this serum has aided in brightening, smoothing, evening and resurfacing my skin. As someone with sensitive skin, I tend to stay away from products that have strong chemicals and acids. This serum does not contain silicone, dyes, or fragrances; which makes it perfectly safe for my skin. Although it is on the pricey side, I definitely recommend giving this product a test run.