This is the only primer which seems to do what it's supposed to.Sophie, UK
Goes on better on clean skin with no moisturiser underneath, but I find you have to leave it to set for a while before adding make-up over the top.
My skin is extremely oily, I've tried SO many primers which have just failed me. I must admit, if I'm in a rush and don't let this primer set properly then it doesn't seem to work as well, and I tend to put two layers on for maximum results.
I put it on over my YSL youth serum, let it set, it makes my skin look so smooth and it feels lovely. This really is a brilliant product, please YSL, more where this beauty came from!!