I only have a few, but I like the colors alot. I have Rehab, Suburbia and Mushroom. I don't really apply them with the wand... I just sort of put a little bit on my eyelid with the wand and then spread it around with my fingertip. It seems to work better for me that way. I usually use them on their own on lazy days... but they also look nice with other shadows on top. Just today I have on Suburbia with a light dusting of MAC Honeylust to give it some sparkle.
I've read alot of people complaining about them, even a blog where a girl tried to use them... and she used WAY too much product trying to get them to look as dark as they do in the tube. They go on sheer... they aren't cream like a paint pot, they are more of a souffle and not quite as opaque as MAC paints. They layer nicely though, give them a couple minutes to dry in between layers though if you want to wear them that way.