I'm wearing Vertigo as I type! Now, it's not a colour that will appeal to everyone: it is sort of nondescript. There's a bit of dark grey, brown and mauve. Unfortunately, the reddish shimmers visible in the bottle do not show up on the nails, except under bright light. I suspect they might be what gives the colour this depth.
All in all, Vertigo applies well, and last a solid four days at least on me, without chipping, which is good to very good considering my nails.
But what really sways me is how elegant albeit unusual this colour is. I find it surprisingly easy to wear (though I can see why some may disagree!). It's my absolute favourite colour for winter.