I think the title of my review says pretty much what I feel about the pigments.
Pros: Some of the colors are really lovely, there's no glittery, just subtle sheen (though some are a lot more shimmery than others), it's true that it doesn't cake or streak, no matter how you layer it (with itself, other pigments or even other powder based formulas from different brands), you get a lot of product with the versatility to add it to other formulas, even nail polish
Cons: A bit tricky to work with, a high degree of fallout, so cleanup is hard and frustrating sometimes, such a tiny , TINY amount goes such a long way that the amount you get is ridiculous. Half the size at half the price would be more practical. This will be rancid before you use it all, even if you cut it into other products (lip gloss, etc) every day, very pure mineral colors can be irritating, especially those with a red base (blues) and I'm seeing a lot of people react when I rarely see that in general
Bottom line: Great to play with, a fun product that definitely has it's place. But not something I'd give 5 stars to with a clear conscience. It's really not for everyone.