Weird how i got a double post - so i edited this one:
One major thing to note about all the MSFs:
I tried them on with no foundation - just well-moisturized skin. Result: looked great. My MA tried Goldstone over his foundation, though, and I thought it didn't look as good. He blamed his skin, but I think these will not look as nice over heavy foundation, period - it sort of sucks up the wet-look sheen texture, which some might like, but to me sort of defeated the whole point. you'd be better off wearing these full face over a skin primer or a tinted moisturizer, if you wanted some coverage underneath, imo.
Pearl and Goldstone work for all over face application - evening skin tone and adding shine. Pink can do the same for cool tone gals, or if you want a cool toned highlight. It's a pinker, cooler and smoother version of Soft and Gentle, pretty similar. I didn't much care for Quartz - can't really use it all over the face and the color was not very unique. My least favorite.