This one I didn't like at first because it was a bit dark and boring to me. But I was mean to it, because it really glows with a subtle green glow, and is far from being boring:
d is only visible in stronger lights (third picture from the top).
I really like the bottle design o W7's polishes, it reminds me of OPI bottles, but less rounded.
I also decided to ttry it with a silver crackle topcoat (George at Asda), but it failed to wow me. The crackle is too fine and you don't see much colour underneath:
Metallic Neptune is from a limited edition collection, but can be tracked either in TK Maxx, Savers or online. They are getting sold out everywhere though!