Cosrx has a lot of good products, and this is one of them. It is a good toner (but I have had a lot of good toner, and this one wasn't any more special than others, therefore only 4 stars). It helps with oily, acne prone skin and (for me) was mild enough to my skin. The only con I have is that the spray leakes -> when you spray with it, some of the product gets out of the bottle through another way and is spilled this way... Nonetheless I would buy again.