The first time I used this product, I think I left it on too long and it burned/ stung my skin a bit. My fault as I didn't read the label properly. As it has a high content of AHA's in it, it can increase your skin's sensitivity but in time with regular use, you get used to it and eventually, I have left it on overnight!
I think this is a amazing product for anyone, who wants to lift the dead skin cells and remove fine lines and wrinkles. This will definitely stay a staple of mine.