The creative part with this product is quite appreciating, at least I like it. It's pretty easy to open each product and mix it together.
For the serum itself, I use it three times once before going to bed and then once the next morning and one last time the next night. For me one box made me three skin care, so for 2 days I would say that I saw a little different on my skin. Those days my skin by your is quite damage and a little bit irritated, and I saw a little difference on the redness but also how my skin was moisturized.