Does anyone know the science and health benefit behind these? I instinctively think they are probably useless and are going to be of very little value to your health, just a way for companies to make money off people's fears.

Any thoughts etc?

I have a volkswagen, so it is not a problem at all. 
Am I right, repo men?! Muhaha.

my boss is going to buy 1 anyways, woopie............