I have worn this daily for the past 6 weeks or so. I moisturize, prime (or not, depending on how rushed I feel), conceal, then use my IT Cosmetics brush to buff this in. I have the color Light-Medium and I must say I feel it's a tad too dark for me, but workable. I'm fair with light yellow undertones, but a lot of redness in my skin as well.
I've also dusted this onto my face on top of liquid foundation for a bit of extra coverage on days that I needed it. The effect was a more even complexion, but I didn't feel as if I had 5lbs of makeup on. I really like this stuff.
There is a slight downer, currently supply can't seem to meet demand. I hope this is only temporary, because I feel I need this in my life :)