I love this to death. I used this product night and day for almost 4 months and I've still got about 25% left! One pump is all you need, apply this after cleansing ASAP! it just soaks it up. No residue nothing but moisturized skin. It smells like lemon tea. Defintially has a citrus note which is great to make you feel fresh. My advice for those with oily skin, cleanse face with charcoal cleanser or any cleanser, then pat face around 80-90% dry and immediately apply this. After not using this for one cleansing time, my face was so dry and broke out. I recommend this so much. Another thing is the cap that is on it incase if it falls or something heavy is placed on top, it wont accidentally pump a precious drop of this serum. Also great for sanitary purposes so that nothing can find its way down the nozzle.