I love the colour range of these nail polishes and they are pretty cheap too. I have the purple and yellow ones.
Formula - this polish is quite thin, and although the colours look fantastic in the bottle you need quite a few coats on your nail to get it to the colour in the bottle. I find these polishes dry quite quickly but can be streaky when you apply it.
Longevity - these polishes do tend to chip quite fast and don't last that long on your nails before chipping. They last three days maximum with a top coat on. The actual polish in the bottle, however, does last a long time. The polish doesn't go gloggy like other cheap polishes.
Brush - the shape of the brush is like any normal polish. Its a good size and I like how it is rectangular and flat so that you can apply the polish to your whole nail in about three strokes.
Would I recommend this product - personally, I wouldn't purchase this product again if you're looking for a long lasting polish. The colour range is good and I know use mine for nail art. So I wouldn't recommend this product unless you wanted a cheap nail polish that you only needed to use a few times or for a one off occasion.
I bought this on a trip to Kmart because it was nice and cheap and I liked the colour, and well nail polish is nail polish, right? Uh, no. I've never had so much trouble actually using a nail polish before. It was thin and streaky when I was trying to apply it, and i couldnt get it to apply evenly at all. Then it took ages to dry, and of course it smudged before it was able to dry fully. After all the effort of getting something that looked ok, it only lasted about 2 days before it was wearing away. All in all, it's fine to give my girls to use in their makeup kit, but I won't be using it again.