Presciptives, Revlon and Almay (which I will discuss below). I had some time to try this out this weekend and I can give an initial review here. Please note, to really "see" the sparkles in this product, please click on the images to enlarge the image.
MAC website as "A silky, feather-light powder, formulated with 70% water, dusts on to the skin as a cooling mist to set and enhance the look of any foundation. Beyond sheer: light-reflecting and translucent. A virtually invisible way to add luminosity and a soft radiant glow to the skin." It retails for $35.50 CAD and you get 24g or 0.84g of product. To compare, the Laura Mercier Loose Setting Translucent Powder comes with 29g. So the container is quite large.
see review of that here. The concept of these two is similar, I think Almay is targeted more as a foundation, it gives a lot more colour (I have Buff here) and coverage (even though it's low). And they both give that cooling, watery feel to your skin. I thought Almay had a lot of shimmers....MAC has tons more!
MAC's Magically Cool Powder did not give me what I expected, this is not a traditional loose powder that you'd use to set your makeup. This is a highlighter, I'd use this over blushes to enhance the glow, or on tops of cheekbones. In the summer, sure a cooling effect would feel nice, but the shimmers will make you glow like Edward Cullen (ya I know everyone makes that comparison, I just had to).
Would I recommend this product? To buy it just for the cooling concept, sure. To buy it to use it as a setter or all over the place? Definitely not. I am still looking for a good cooling liquid powder with no shimmer in it. If you have one, or know where I can pick up the Prescriptives one, please let me know.