i used this serum in conjunction with the night cream once a week, and oh my god my skin is just wow. it gives you this luminous glow to your skin when you wake up in the morning, skin that is soft and supple to the touch. i have never ever in my life come across an amazing serum like this. its so hard to describe in words what it does to your skin,this is really life changing stuff, just wish the clarins range was a tad bit more reasonable.