This product is finally clearing some stubborn cystic acne that my other acne products are not working for anymore. It is expensive, but it works!
It did tingle the first time I applied it, but not anymore. I have been using it for 2 weeks and already my acne is starting to clear up. (It will sting on open, raw acne sores or any kind of cut or abrasions)
I use this during the day and a retinol + acne medication at night. I find that I can keep dry flaky skin at bay by placing a good thick moisturiser on top (let the Glycolic acid do it's thing for 20 mins or more before applying something on top)
If this clears my acne and keeps it under control, then I definitely will be purchasing again!