I already use a really good mineral foundation so I'm quite used to the application method and therefore also, what to expect from results so when I had a voucher I figured I'd give this a try and satisfy my curiosity (which was piqued because this doesn't contain any Bismuth Oxychloride which a lot of them tend to do).
I picked up Medium as it was during summer and skin was a little bit darker than usual. One of the great things about mineral powder foundation is that you can easily mix it with another colour to make it lighter or darker as you need so I wasn't worried I had the wrong colour.
I had a few expectations from this product and surprisingly it has met them all: 1) It needed to contain no ingredients known to cause irritation or potential breakouts. 2) It needed to provide decent coverage. 3) It needed to make skin not look oily/greasy at any time after application (a problem I have with a lot of products). 4) It needed to look natural. 5) It needed to be transfer resistant ie not come off on fingers or clothes. 6) It needed to last from the time I put it on in the morning till the time I took it off at night.
I tried this with my usual kabuki and it was ok, not great, just didn't find it gave me the coverage I was looking for but when I used this over my regular mineral powder foundation with my cheap $14 ELF kabuki from K-mart I was blown away. It gave a beautiful satin-matte finish and made my skin look almost flawless (a miracle since I have a lot of acne scarring).
The grind is so fine that the jar it comes in will last you a very long time which is fantastic as it has become a staple in my routine.
I use this day in and day out (and will need to buy more in the next few weeks!) I absolutely love it, I don't wear a lot of makeup, and never wear heavy makeup, so this does it quite nicely for me though it did take some getting used to, to be able to put it on right and not end up with thick patches where I hadn't tapped the excess off the brush well enough.
I set my MAC face and body with this powder every day, and it has not failed me yet! I also wear it on it's own frequently and it sits nicely without anything underneath.
Tips: I put a small amount of powder into the lid, swirl the brush through it, and tap my brush vertically (handle down) on the sink to disperse the powder better on the brush. This always works the best for me, no thick patches on my face, and no mess on the sink or my clothes!