This serum works a little bit... nothing revolutionary, but "a little bit" is definitely better than nothing for fine lines. I had assumed it was a moisturizer, but it's not--you apply it after cleansing and before moisturizing. The texture is a runny gel--a bit thicker than water, but not much (e.g., lighter than any lotions). I sometimes have sensitive skin but this didn't bother me at all, and after a few days my forehead lines looked a tiny bit better, though the ones on my cheeks and near my eyes looked about the same.