... I opted for a Smart car as a loaner (courtesy vehicle) when my SLK was being serviced before only because I wanted to test drive one for a couple days. I had a small inkling of possibly getting one for a rain car but the following experiences behind the wheel of a Smart car changed my mind...
Point 1: transmission was not as smooth as the SLK... it felt like it had huge amounts of torque when stepping on the accelerator, as the car would buck with the clutch action but there was nothing behind the engine to give it any peppiness
Point 2: driving over 65 with a crosswind of 5+ mph is not recommended
Point 3: passing or being passed by a tractor trailer rig on the freeway... see Point 2
Point 4: following my honey's Corvette just made me feel so sad!
To be fair to the Smart car... the things I *did* like about it...
Counterpoint 1: lots of fun to park in public parking spaces (parallel or otherwise, especially those skinny parking spaces where you'd never think of parking your SLK)
Counterpoint 2: if you've never been behind the wheel of an SLK, this would definitely be a fun car to just putz around in because of the "no one else has one" factor
Counterpoint 3: it does take turns pretty well!
Counterpoint 4: it does go over 75 (but not recommended... see local traffic laws for more information)
Counterpoint 5: Brabus made a turbo-charged version!!! check it out here ===>Brabus SMART car