I just wanted to add in my thought-pennies:
I received my complete sampler packs of their micas, matte pigments, and cosmetic additives (like 8 powders?). I am so thrilled and happy. For exactly $100 I have so many gorgeous pigments. I can say that I almost HATE MAC pigments because they give you such a huge amount and they cost so much and many are hard to obtain. They're not ideal collector's items for me because the guilt that accompanies the HUGE, unusable portions bothers me. These micas are an amazing solution.
Of course, they're unblended so they don't stick as well, but they're so smooth and blendable on top of a base. I've found dupes for the few pigments I have and am currently selling...well, dupes enough for me, since I am not a MAC pigment connoiseur.
Their sheen and texture are just amazing. And I know that since these are high-quality pigments, I can use them to make my own oil paints and colorings for art.
I even just love the idea of mica. I spent one summer in NC collecting raw mica from the river, and it's a beautiful mineral in its un-powdered form. It delaminates in thin, transparent, iridescent sheets...gorgeous.