So I had heard a lot about Cosrx's AHA and after trying and loving the BHA, I decided to take the plunge and buy the AHA. I used it in conjunction with my BHA this morning and my skin is so much smoother and clearer now! I had some blotchy redness and PIH on one of my cheeks that I've been trying to clear up, and now it really looks like it might go away. I can't compare this AHA with any others as this is my first AHA, but it does seem really good. Looks like a potential HG! (Also: some people say this AHA smells, but honestly I don't smell anything.)