Texture-wise, the Radiance Serum feels a bit sticky when I first apply it on my skin. I usually leave it for a few minutes before applying moisturizer to allow the serum to sink in. You will know when it's ready as it will feel noticeably less sticky. The stickiness actually owes to its hydrating property. Now that the weather is still humid, I only apply it on my blemishes and areas that require brightening, say the apples of my cheeks and my undereyes. But my guess is, I can use it over my entire face when the wintry weather sets in.
Oh, one last thing. Don't forget that the serum contains a star ingredient, grape seed polyphenols, a natural, highly potent antioxidant that helps delay or slow down the skin aging process that we all detest. In other words, it's an antioxidant, hydrating, and brightening serum. It's great especially for acne-prone, sensitive skin and it's definitely a value-for-money product (even better if it comes in a gift pack!) that you should seriously consider including in your coming beauty haul.