The eyeshadow. Just got the original. I haven't found many good tutorials with it that's not a smoky eye, so I'm going to play with different shades whenever I wear it, take a picture and write down wtf I just did. I can never remember what colors went well together on my other palette, and especially with this one being so coordinated.
For those that have it, what are your favorite shade combos? Or do you have one of the other naked sets? I am a ging, so I couldn't do the third one even though those colors are amazing.