I've been so excited about this stuff for the longest time! I finally bought some just the other day in a lovely blue colour and I'm hugely impressed with the results.
I used the Black 17 nail polish I won in Charlotte's giveaway as the base colour. I applied two coats of this.
Next I applied a thin layer of the Barry M. The thing I love the most is that it will really last for a long time, the thinner the coat the better the result in my opinion. For only £4 too, a total bargain!