Supposedly it has 180hp and can go 280 miles on a tank of hydrogen. If it is the same size as a Civic, it would be more powerful. If it is the same as an Accord, it would match the base model pretty closely. As for safe, they say it's safe but that's what they said about the Hindenburg. If you read the site you will find their answers to how it was made safe, etc. This is supposedly a production vehicle, like the EV1 or the Chrysler Turbine car, that is being released in limited numbers to vet the technology. Like the other two, it is a lend or lease arrangement with no sales of the cars to private individuals as of yet. As for sound, well.. there really isn't much of any sound. It is essentially an electric car with no combustion happening, just a chemical reaction. I know the GM prototype that was shown everywhere a few years ago had a noisy air compressor that was needed to make it run, but I think Honda probably got rid of that.