I am so glad that MAC made many of the Extra Dimension shadows permanent. I was finally able to get the shades I missed in the Alluring Aquatic collection (of which Silver Sun was part) as well as a few other shades. Silver Sun "almost" completes my collection and I was waiting eagerly for it to be back in stock. This is a wonderful silvery green shade. I thought it would be similar to Vex so, before getting it, I swatched both side by side at the MAC counter and this is so much darker and greener while still retaining a silvery aspect to it. As it's the Extra Dimension formula, it performs beautifully when applied with a damp brush, delivering a more deep and intense shading. I don't think I have anything at all like this in my eyeshadow collection and I'm so happy to have it. It's an interesting shade in that, applied dry and used all on its own, it's perfect for hot summer days since it looks so cool and fresh (not unlike the left side of Nars Habanera, though it's darker green than that shadow) but the ability to apply this more heavily or damp for a darker application makes it perfect for autumn, especially paired with a brown or dark grey/brown (like Copperplate or Coquette) shadow.