I love Vex. I'm NC45, and it comes out looking pale pinkish purple on me. I can pair it with so many shades. It looks great with Motif for a pink look. I also use it as an all over shade to build up a purple look. I haven't tried it with greens, but it is extremely versatile. Well worth the buy.
This is a veluxe pearl, so already it gets my vote. However, as other posters have said, this comes up looking more green than gold, but a really pretty green on my NC45 skin. This color is PHENOMENAL with Expensive Pink, but the key for these unusual/non-neutral shades is placement. I would recommend putting this in the upper inner corner lid, and using it as a highlighter under the arch of your eye -- but sparingly. Putting it in the inner upper corner of my eyes makes my brown eyes pop.
In general, I do not like MAC Lustres. They are generally very flecky and you end up with the product all over the place. I am a NC45, and this color looks great. This is the only reason I gave it a 4. However, the ONLY way I can get Lustres to work is to apply them with my fingers. For this reason, I probably would not buy it again, and wait for a similar color in Veluxe Pearl to come out.