Hola Munchkins!
Priming is something that I've only recently gotten in to - sure, I've dabbled with a few primers, but there's never been one that has captured my heart (and face).  However, I have now come across a winning eye and face primer combo that is a) less expensive than many I have tried and b) actually seems to work.  
Rimmel seems to really have hit the nail on the head when it comes to priming issues. The Stay Matte Primer is absolutely lovely - feels more like skincare than a primer: soft, slightly slippery, and almost serum-like in texture, this dispels with all the silicone-primer nonsense that tend not to work on my oilier skin.  It really does seem to help lengthen the life of my foundation - of course, especially on oily skin like mine, it is never going to work 24 hour miracles, but it does definitely help, and is something I would definitely recommend.  The Exaggerate Eye Shadow Primer is however, the bomb when it comes to eye priming.  I now notice the difference when I do forget to use it - shadow smudges, and seems to travel to parts of my face that I don't think shadow should ever travel to.  With it, however, eyeshadow stays vibrant for more or less the whole of a working day or night out!
Definitely two products that I would wholeheartedly recommend.
Much love, Ani x