I have been following them. I think I would buy one. As far as safety, it is expected to perform well in government crash testings.
All of that being said, I would probably wait a little while to see how everything turns on. Not sure if this company will be able to keep the doors open. I'd hate to have a new $7k vehicle and then have 0 support for it. But I like what I see so far. This would save me an incredible amount of money in fuel savings driving to and from work.
I'm intrigued about it and personally would consider it for city driving only, but I get better city MPG in my prius already. Time will tell how reliable this will be and I would stay away from the first year of production.