How good is this invention!!

I saw something about it on a doco the other day on TV and it looks like a real winner.
He was using it to power a buggy around a Melbourne fruit and vegie market.
I think its great that people are coming up with more ways to power vehicles than your standard fuel and gas. The sooner we can break away from our reliance on oil and gas has to be a good thing.
It does cope flak as not anywhere near as efficient as motors that used fuel, but fair go nothing currently comes anywhere near the energy output of hydro carbons. They have a 30/1 ration whereas wind has a ration of 5/1 and solar 4/1. I just think its great that people are thinking outside the box when it comes to different ways to propel a vehicle.