This is my first AHA/BHA product, so I don't have anything to compare it with. Also I'm using it only in my night care routine. Based on that I can say that I don't see any difference after using it for a few weeks. I have various skin problems like seborrheic dermatitis, acne prone and very sensitive skin and on top of it - polly allergy. Can't say that there's a noticeable change, but there's no worsening of my problems either. No irritation or bad reactions, not even an uncomfortable feeling.
I was going to give 4 stars, but since I'm not fully using the product, I don't feel I have the right to be critical.