I've been really wanting to try a magnetic nail polish, but didn't want to shell out the $12. This one was a little over $7.
The polish applied like a dream. Soooo smooth. I would even wear this polish without the magnetic design. This one comes with two magnets.
The effect is cool, but you have to get the magnet really really close to the polish. About 1 mm from it. That means that it's very easy to accidentally bump your nail polish and mess up. The most contrasting effect comes about when you layer a thick layer of polish, then quickly apply the magnet. Hold the magnet for 30 seconds to allow the design to set. I found that when I removed the magnet after only 15 seconds, the design was likely to diffuse slightly again.