I absolutely love this product! I absolutely love nail varnish, and am a big fan of Barry M, so when I got this product I was really excited. I'm always wearing different nail varnishes and sometimes I feel that my nail look abit plain with just nail varnish on so when I saw this in the shop, obviously I had to buy it. It's a really simple product to use, you just apply a thin layer over a coat of dry nail varnish and sit back and watch the magic happen. It really is amazing watching the varnish start to spread apart and form a crackle effect over your nails. I love this nail varnish as you can apply it over nail varnish for a simple everyday look, or choose a bright bold colour and wear it on a big night out. It looks great and tends to stay for a fair few days without chipping. I also like the colour range available as it means you really can have fun with your nails. This is a must have product for people who love great looking nails but don't have the time or money for a manicure or who aren't so great at nail art. The only disadvantage I can think of for this product is that I find it will dry very quickly so make sure you apply to your nails quite fast and dont leave the brush out of the bottle as the varnish will dry on the brush and around the top of the bottle.