The duochrome in Opalesse is what caught my eye when I first purchased it, It is a gorgeous off white at first and flashes pink/purple when it hits the light. It is buildable so the white doesn't look too stark at first and looks amazing with a darker purple in the crease.
It wears really well over a primer and resists creasing for the most part unless you sweat a lot at the gym or go somewhere very hot and humid.
The formula of the Extra Dimension eyeshadows is amazing! I like using them dry or wet and they feel so smooth and rich when you apply them!