I use this twice a week. I apply a small amount and gentle rub it all over my face. Personally, I don’t find this very harsh. There’s a slight “sting” but it’s not too bad for me. I leave it on for a few minutes and then rinse it off. It’s sort of a pain to wipe away all the residue but my skin feels soft afterwards. I definitely feel like it removes a lot of dead skin cells from my face. Its like an easy, quick facial. I typically use this while I’m in the shower too so the hot steam helps. 

This didn't irritate my skin, which I was really happy about. I'm not sure I would repurchase this because I didn't notice enough of a difference after incorporating this into my routine.

I have oilier skin and I can handle higher percentages of acids on my face. With that being said, this tingled very minimally and only lasted 30 seconds or so. Once I washed it off my skin looked brighter and felt smoother. For people who cannot handle strong acids this should actually work for you. The ingredients in this are quite comforting to counteract the possible sensitivity to the high acid content. However, I found better results with Deciem's AHA/BHA peel for about a third of the price.