This stuff, along with some other mineral makeup, is praised to the skies among some circles. Personally I hated it all, and it made my skin look WORSE, no matter what I did. Maybe it works for younger, oilier skin, but for those of us who are older with imperfections, it does nothing and actually accentuates them, like lines and pores. NO thanks.(holds bottle of liquid foundation in her cold little hands LOL).
I do agree though in general about getting a good color match - this applies to any kind of foundation. Even just a little bit off, and it makes one either look pasty, jaundiced, or dirty. Store lighting in general is just awful for getting a good match. I always step outside to see how it really looks, and also wait an hour since makeup does tend to oxidize a bit on the skin, shifting color a bit.