I've been using this for a while. It's a bit pricey, but the value for money is outstanding! I use it as an introductory serum, and it's not sticky, it plumps up my skin, and it helps my lotion penetrate better! I've tried a lot of similar products from Lancome, Clinique, and others, but this is the best. I have dry skin, so I used a very moisturizing lotion, but since using this, I've found that a moisturizing type is enough. One pump is enough, so it lasts a long time. It's no wonder that it's a product that actresses use!