Tata Air Car

I will be buying one of these cars as soon as possible. The money I save in petrol costs will pay for the car within 2-3 years and I like the idea of being in at the start. I imagine that like all new technology it will have its critics, but lets face facts the more petrol prices rise the more I will save and the sooner it will pay for itself. Forget global warming I think that is a natural phenomenom I just want one to save money.