From my personal experience, it is more effective than Sunday Riley Good Genes, yet still is very gentle on the skin. My skin does not agree with glycolic acid so this is a god sent. Already got my second jar. Will forever repurchase.

I am torn by this. I quite like the acid itself, but find the pads to be very flimsy and fragile. I barely swipe it over my face than the pad disintegrates and becomes unwieldy to use. The amount of acid soaked into these pads also seems to leave you wanting. There isn't much to go around. It's a shame really. I really like the product, but it is difficult to use.

It makes my skin feel a bit tacky after use and I have a hard time getting over the smell. Reminds me of the Clearasil pads I used when I was a teenager. Somewhere it reminds me of ammonia as well. So all in all not really overwhelmed by this product. Sorry Zelens. But it does get rid of dead skin cells that linger around.

Now I see why my skin was so overreactive: I was using the wrong acid tonic after cleanser!!! Glycolic acid turns my skin into a overreactive, sensitive, wild beast, these little gems gently exfoliate but are not too aggressive onto my crazy behaving skin! Highly recommended!

I was really impressed by these - my skin was clearer and brighter after use. They are strong but I don't find the Zelens pads as drying/stripping as other acids can be. I was able to use them once a day, in the evening, and I have slightly sensitive skin.