Firstly I wasn't sure how my skin would react to products with acid so I tried it from my friend for a few times. I have acne that's been continuing for years now and I like to believe that this had a positive effect in fighting it. I like the fact that even though it's still very thin and light, the consistency is slightly thicker (for example, in comparison with COSRX Natural BHA Skin Returning A-Sol which feels more like water) and even feels somewhat moisturising.