Neither of these billboards is spectacular on their own. The light blue colors and the collection of advertisements around them detract from them. The addition of one long tube makes all the difference on whether they get noticed or fade into the background.
This final advertisement is built around a subway entrance. It stands out from its environment, but I'm not sure that ad does much for the mini-cooper. It is still a creative use despite making the car seem a bit like the clown car in the circus.