I'm in heaven! This is one of my recent purchases from eBay for around £14. It's a holographic top coat and amazing!
Indoors with flash.
It's an OPI, so very easy to use, apply and brilliant brush. I used one coat on the above nails from an Economy Nails post (Powdery Mauve). It gave a really good finish and was smooth. It dried quickly, which is good. And it's AWESOME. Obviously with this sort of polish, you need light :-)
Not many get 10 out of 10, but this one does. It's worth every penny and will make your nails look even more awesome than they already are ;-) Easy enough to pick up on eBay.