From that I heard their safety is better than expected but it is extremely uncomfortable to me. Drove a 2004 Smart Roadster (larger wheelbase, closer to a conventional car)- it is like a hybrid of golf cart and motorcycle. Quite a fun to drive though, might be convenient in a crumped European streets but I wouldn’t like to take a long trip or use it as a daily ride. Acoustic comfort, smooth ride is not about this vehicle.
Safety is relative... Yes the car body can withstand a collision better than another small car, but that’s irrelevant when you are dead because the deceleration was so abrupt your brain splattered onto the inside of your skull and your ribs were turned to splinters that shredded your lungs.
Trust me, odds of you surviving an impact at highway speeds in one of these is next to nil. Sure they shell of the car may not be a mangled mess, but you will be.