Vixen is a really deep (almost brown) red, very wearable and classic. It's a little bit different to the colours I'd usually wear but I like it nevertheless.
This is only the second Revlon polish I've tried and application was pretty good, I find the brush easy to use, but the formulation was a little bit watery and it was easy to apply too much or for a big blob of it to suddenly run down from the top of the brush. Drying time was fine too as long as you don't apply too much, I forgot to apply topcoat on this and it chipped by the second day but this probably wouldn't be the case if you did use a topcoat. I'd also recommend using a base coat with this as I suspect it would stain...
I had thought it was quite similar to Leighton Denny polish in Monroe - and it is, but Monroe is a little bit pinker. I doubt the untrained eye could tell the difference anyway!
Apparently, this was what Adele was wearing at the Brit Awards, applied by Mike Pocock - I love her makeup and the way she does her hair, it's all very classic and she knows what suits her - and is Revlon's best-selling nail colour.