I received a sample of this serum with a purchase of other products and fell in love immediately. I use it at night before my moisturizer, and I have definitely noticed an overall improvement of my skin; it looks and feels much softer and smoother. Also, it smells like a vitamin... literally. Which to me, seems so much more authentic and I love it.
All of their products are amazing.. they WORK, they are incredibly affordable, they usually always send samples with your order (which has led me to buy pretty much everything :)), plus they have the best customer service!