I've been using this product for about a month now, and I like it even better than I like their regular Vitamin C Serum.... and I really like that too! I ran out of the regular serum and decided to give this a try because it has more of the "good stuff". I have one particular spot on my face that I've been watching, and I'll be darned if it isn't showing definite signs of improvement. The wrinkle is diminishing slowly over time. You don't notice anything overnight, but give it a month or so and you will see positive changes. I like this company too, They send brief, polite follow up emails and seem to really care that their customers are satisfied. I put it on most of my face, let it dry, then follow with moisturizer.