This was far too strong and definitely needs some downtime afterwards. It only tingled while it was on my skin but after I washed it all off, dried it and put a skin1004 moisturiser on did I realise just how strong this was. It wasn't a bad reaction either as my partner experienced the same. We both followed the instructions to a T. It burns so badly when you wash it off and apply a moisturiser on afterwards. Please make sure to use a VERY gentle cleanser before using this. Do not use it if you plan on going out into the sun the next day and use at night. It says 10-15 minutes so I did 13 and I wouldn't do it past 8 minutes again to be honest. Apart from my face looking like a tomato, my skin does look quite good. DON'T USE THIS IF YOU HAVE ANY TYPE OF SENSITIVE SKIN. Don't forget to patch test.