One of my favourite nail polishes is from Essence. They come in a variety of colours and are very affordable, so you can walk out of the store with a number of them.
The nail polish brush is quite thick and so, in one stroke you will have nail polish on the whole nail. You will need about two more coats before you get a lovely solid colour.
The Colour & Go range stays true to its name. within a minute, the nail polish is amazingly completely dry.
The major downside, however, is that it starts chipping within a few hours. you are likely to only have it on for a day before you need to remove it because of chipping.
Personally, I think the Colour & Go range is good for quick/emergency nail colour application before a night out, because it dries so quickly. However, it is not suitable for someone who does not have time to always be re-painting their nails.