I drive 102 miles daily on my commute. Backroads and Interstate. My little bumblebee (yellow and black) takes it all in stride. I buzz along the interstate at 75+ with no problems and tootle down the backroads in fine style. I have talked to dozens of people about the car, given away a dozen brochures and extolled the virtues of Smart driving to anyone who would listen. I'm a big guy 6'3" 250 and have plenty of room.
Love the roominess, style features and zippiness when driving in "paddle" mode.