I've used this for less than two weeks and have already seen major improvements in my skin. I was hesitant at first because I never used anything with AHA or BHA but I love this so far!
Before I go any further, I have been following the Korean skincare regimen for about a year now. Before I used this product, I was having trouble with a "colony" (for lack of a better word) of 4 pimples that kept coming back no matter what I did for about a month. I usually use Etude House Wonder Pore Toner and wanted to use something different so here I am. I did my routine like usual except for using this as the toner and the morning after I used it, I noticed immediate reduction in size and redness of the blemishes and was amazed. 13 days later, the blemishes are almost all gone.
I also have large pores on my nose and they are the smallest they have ever been in my life, which sounds dramatic, but it's very noticeable.
The instructions seem like they have been translated from another language, this made me raise my eyebrow and was hesitant but I assure you, I got an authentic product. I love the spray nozzle too; I don't use cotton pads/balls with these and just spray on my hands and pat it on my face.

I bought this for myself couple years ago and then my wife started using it last year and has been obsessed. I also saw how her skin has become clearer and healthier after changing her skincare to Cosrx and she's not turning back.

I tried another toner of this brand (it had a green label), and this one feels much more refreshing. I use cotton pads to apply this toner and it doesn't feel very sticky if you make sure to spread it well into your skin. I follow up with serum and it seems to do well. I have no real complaints and it leaves my skin with a glowy feeling.