I gave it a week now, but boy does it do wonders for me after this short time. After three days--and in combination with the I'm From Ginseng Serum which I use alternatingly--I started to feel a difference in the way my skin absorbs my toner before and my moisturiser afterwards. I suffer from really dry and constantly dehydrated skin that is nevertheless prone to blemishes/blackheads. I've finally managed to strike a balance now--my skin is clearer, brighter, but also hydrated--and this despite a rather hormonal phase.
It's on the pricier side, so maybe I'll recommend to try any of the combo of my products (Rich Moist Cleanser, Hyaluronic acid toner, Ginseng Serum, Beta Glucan Moisturiser) before adding it. But it works for me!