Ok so this high definition powder is meant to create a soft focus. However I think that on skin of color it'll just make you look ashy if applied over foundation. I found it to be drying over my liquid makeup. And enhanced the fine lines. It can possibly be used by itself if you have fair skin but I found that on bare skin I look ghost like. And i did not use alot!
But when I used this powder UNDER my foundation, it was much better! I was able to see it make my foundation go on smoother. And my skin was able to stay moisturized since my liquid foundation was applied next. I found that I did not get too shiny later in the day having used it (I sweat on my forehead and upper lip lol).
So all in all with primer it might stay all day. I would not recommend this product for everyday wear as they state. It has a very nice look in photos as shown above. And works best under foundation if a person of color and may work in more varied ways if fair skinned. Like it (after reworking it) but not in love.