I'm in love with this serum! It's a light liquid, non-sticky, and you can use it after vitamin c or just the hyaluronic acid. I even use it on DIY sheet masks and I can feel my face moisturized. The smell is really sweet and I think that even the more sensitive skins could use this serum. It absorbs really quickly even when I have very oily skin. I love the quantity-price relation because this bottle totally worth it! I'm gonna buy it again.