While this primer does not last 15 hours, it does last an awful long time. I have quite oily skin, so it tends to wear off on me a bit more. However, it does definitely reduce the size of my pores and make my skin look better overall. I really like that it's applied like a stick rather than as a liquid or cream, as the Dr. Brandt primer I tried just looked flaky on my skin. The price point is also extremely high at $32, but it does last longer than the cream versions in my opinion.

This make-up primer works pretty good. Not sure if it lasted 15 hours but pretty close. Gives the appearance of flawless skin.

I hate the application of this. It's a stick, and I find it hard to control/manipulate where the product goes. Also, I found a lot of wasted product at the bottom of the applicator that I had to dig out with my finger just to get at.

I would recommend this product. It really does what it says! it goes on for smooth and has a cooling effect on your skin. When I apply my foundation it does feel as if it is sticking to you. Worth the money as it will last a long time!

I'm truly impressed with this primer. Most days, I skip primer because I don't find that it makes much of a difference in my makeup. After falling in love with the Benefit Stay Flawless Foundation, I had to try this product, too. The primer is rather pricey, $32 USD for 15.5 grams. The packaging is cute, although a little flimsy feeling -- sometimes the cap doesn't snap on quite right, etc. The primer itself is a twist-up stick form (think glue stick) and I find that the best way to apply it is directly from the tube to your face (however unhygienic). It's not really a spreadable/bendable thing, so applying it to your fingers and then your face doesn't really work. This stuff is truly heavy duty. It makes my makeup go on so smoothly and seriously last a very, very long time. My makeup has never been so long-wearing -- it's great. Totally recommend this primer.