I was so excited to try this ampoule. I have heard many great things about it. At first, because I did not patch test, I believed this ampoule did not agree with my skin. After a week or so, I tried it again and with no problems. My skin is becoming drier as the season changes to Fall and I need some more moisture in my routine. I apply this morning and night with a moisturizer on top to seal it in. my skin seems to be more plump and supple in the morning and it wears well under makeup. I want to try the snail version of this but I don’t think I will ever run out of this one.