Oh neon blue, my old nemesis. My favourite colour to wear and my least favourite to photograph. This one's worth the effort, though:
Two coats. I've used a topcoat but the polish (surprisingly for a semi-neon) dries glossy in any case. It pools a little at the cuticles because it's a thick creme but the brush makes it very easy to control, I had barely any clean up. H&M polishes are only £2.99 and while the quality isn't the best I've tried (I tend to get wear after 2-3 days), for the price they're pretty unbeatable.
And the colour? Drooooool. Very very bright mid-blue with a hint of violet. It's really gloriously loud and opaque.
(If any of you are into mosaic, there's a bright blue smalti tile that matches this colour. It was my favourite when I was a kid, I used to use it in every craft project going. So I'm pleased to be able to wear that colour on my nails!)