I first drove a SMART a few years ago from Vienna to Prague. I loved it, and it was much less powered and of less quality construction that my new 2008 model of 2 months and 2000 miles. It's a great little car for convenience, handling, economy and appearance. Just watch out out for potholes and speed bumps, and remember that it is a small, basically low powered car, that will still drive at 80 MPH if you want to - and maybe have to on the Interstates, where huge tractor-trailers often enjoy driving 5-10 feet behind you at that speed. Where are the cops when you need them?
Appearance, comfort, handling, mileage.
Better, more sensitive radio. Cruise control would be nice. Quicker response from a standing stop would be an improvement.