Its NARS so you expect high quality
I have purple rain and its my favorite dark purple nail polish own besides paradoxal by Chanel. The color has a cool reddish sheen that shows up when you move your fingers. Nars I expect very opaque and bold colors and this what you get especially paying $16 for nail polish.
This is probably my second fave high end nail polish to Chanel. I have one in Purple Rain which is this royal purple but it reminds of Sugarpill's poison Plum in a nail polish form. You just need 1-2 coats and its on and dries pretty quickly and its also not streaky which is great.