I've been using this stuff since its launch in January 2011, but I've waited a long time before leaving a feedback because I had a love/hate relationship with it.
I have an oily skin with very oily areas (like my nose which is as shiny as a discoball about 2 hours after washing).
This product has really good points :
- nice lighweight creamy consistency,
- leaves an invisible finish,
- blurs pores,
- does not dry skin (almost the most important point for my easily dehydrated skin),
- controls oils for several hours (but not more than 3-4 hours when the weather is hot and humid).
The bad points I noticed :
- the cream formula can leave streaks if massaged for too long,
- all powders do not cling well to it,
- can flake if I use too much (depending on how I apply it, I'll explain why later).
I've used it several ways : with a flat top brush, a concealer/foundation brush, a taklon powder brush, a dual fiber brush and my fingers.
The best way to get a smooth finish was the concealer/foundation brush but I tend to use too much and it flaked when I applied powder.
The best matte finish was when I used my fingers, I used less product (and it did not flake anymore) but I needed to dab dab dab dab or I did not get a smooth surface. Then a Paula's fan said on PC's facebook page that she used a makeup sponge (I did not try this way)... what a difference !!!
Since, I've used the Shine Stopper only with makeup sponges (either latex or non-latex), dabbing it gently, layering it on the oiliest areas, and the finish is flawless each time, with a smooth matte surface, no more streaking, no more flaking, and my powder clings far better to it :-)
PS : I cannot rate this as a foundation primer as I don't wear foundation anymore.