17 Magnetized Polish comes in 4 different colours. Unsurprisingly, I chose lilac. They cost £5.99 each, making them cheaper then both the Nails Inc and Fashionista versions.
The lid of the polish comes off to reveal a smaller lid, which is much easier for application. I applied one coat, let it dry, and then applied the second coat and hovered the magnet over the top. I recommend doing it nail by nail as the polish needs to be wet for the magnet to work, and it dries quickly!
The magnet has a little ridge to rest the nail on, which makes the whole process much easier. I held the magnet over the top for around 15-20 seconds. The boots website recommends 10 seconds but I'd leave on a tiny bit longer. As it was my first attempt, my final result wasn't exactly consistent. I'm right handed and completely and utterly useless when it comes to using my left hand for anything, so I managed to bump the magnet against my nail a few times when painting my right hand. You have to be very careful to make sure the magnet stays still.
My camera has a thing about nail polish, it never photographs right. The polish is a little brighter and more of a purple then it shows in these pictures. You'll have to excuse my super messy application, I was in a bit of a rush.
I applied the polish on Saturday and it started to chip on Wednesday. Very impressed! Polish never lasts on me, so I'm happy.
Overall I think the effect is really beautiful. It's very different, and much, much nicer then crackle polish in my opinion. I'll probably be buying people this for Christmas this year!
This polish is avaliable at Boots.