This is probably the best eye primer I've ever tried... Seriously, it beats Urban Decay, Too Faced, and anything in between. It stays until you take it off (I even had to use oil based remover), it intensifies the shadows, it's smooth and invisible- everything you want in a primer. It even worked great for me with loose shadows and pigments.
I always do swatches without primer, but here is Burberry Antique Rose just to show the difference: