Considering it's size it's relatively safe, at least in case of the unlikely event it crashes into something similar in size/weight. Otherwise not as safe as larger and heavier IIHS top safety pick.
My preference for more "fun to drive" than a Smart is a Lexus (IS350 Fsportedup w 19,s, T1R, F sport exhaust), very quick, crisp handling, very fun. Not all Lexus cars are a big LS sized boat fortunately.