I wanted the Nails Inc version since its release so I was delighted when I spotted this at half the price! I got it in Lilac which is more dark purple than lilac! Easy to use and has 2 main advantages over other versions. It has a shaped rest on the lid so you can rest it over the polish without smudging, and also the magnet lid is detachable from the polish lid for mess free magnetizing. a great little dupe!
This nail polish is a dupe of the Nails Inc magnetic nail polish that costs £12. The 17 version only costs £5.99. It has a magnet in the lid, you rest the ridge on your finger at the base of your nail/cuticle, hold for 10/15 seconds and it drags the nail polish to create the effect. I have compared the grey Nails Inc to the grey 17 and the amount of "magnet effect" you get is the same, but the Nails Inc one definitely has a more holographic look to it whilst the 17 one is less shiny, more sand duney. However for the price difference, I don't really care, the 17 version is good enough! Also 17 comes in shades that aren't available in Nails Inc, you can get it in grey, blue, purple and green. I believe Nails Inc comes in grey, gold and one other colour. All in all, if you want to try this new craze but don't think it's worth £12, definitely pick up 17 in Boots instead.