So far, so good! I was looking for a good serum but not at an astronomical price and this fits the bill well. I can definitely feel a slight tingle when I apply it, it goes on well and absorbs into my skin fairly quickly so I don't feel greasy. I haven't used it long enough to really see any c change or difference in my skin, although I don't have any complaints either.
The serum applies well and leaves my skin feeling refreshed. There is a slight tingling feeling when properly applied, which I personally enjoy because I believe it makes me feel confident the product is properly applied.