First off, this product is $6! $6! It is hard to find any powder for less than that (much less, a product that is of high quality).
I apply the powder with a large kabuki brush (it comes with a powder puff) over my foundation to set my makeup. After application, my skin looks flawless and even.
I chose the translucent shade, but they also offer corrective yellow (used to correct under-eye circles and mild red tones) and shimmer.