The original run of Spirit of Darkness has a special place in my bag every game. When I saw that they were doing a new run, I had to pick up an updated set.
It's a fantastic little set if you like the palette -- there's nothing to really be inconsistent, so you don't have to worry about getting a dud. Under light, it's a deep purple with a coppery shimmer. Held up to light, it's a foggy grey.
The only way to improve these, in my opinion, is to replace the silver ink with copper to really bring the shimmer forward (and I plan to do just that as soon as the opportunity presents itself), but even if you don't, you're still going to have a genuinely excellent set -- especially with the new D4 mold!