I'll believe it when I see it. These compressed air mini-cars have been '2 years away' since 1999. It doesn't seem practical to me to get the energy density required from compressed air. A private company with no 3rd party verification can say pretty much whatever they want ..

Their business model is untried, and may not work. However, the basic physics is right, and there is no information that would eliminate the machinery working. Don't invest unless you have speculative interest and free cash - but if interested in this field, keep an eye on them. I spent several years checking everything about them that I could before taking the chance.