I have yet to dig into this lovely limited edition piece from Guerlain, but I thought to share since it’s probably the most expensive make-up I’ve purchased for myself, and it made me feel all sorts of happy when I finally got it. What I can say from the tiny swatch I did is that it is lovely, buttery soft, and very shimmery. Great for cheekbone, nose bridge, and eyebrow highlighting. Probably not for the whole face though, because it can get a little shimmerball-y. Enjoy.
Shopping ban disclaimer: This was purchased prior to the shopping ban 
pretty pretty
have yet to use mine… too pretty to touch it 
I know!! I think I’ll just stare and sigh at it.
and then we think why did we ever bought it
because it was TOO PRETTY TO RESIST!
and then we stay sighing all over again LOL!!
I really love it! should search for it too =)
Good luck! It is a limited-edition item so it may be sold out.