It's fun to drive and has a good amount of power for the size of the car. Overall it's a decent car. A few initial complaints would be the passenger seat is a little uncomfortable when the cupholder is installed (although it is removable), the standard stereo is mediocre (speakers rattle at times and changing stations is not intuitive), the second cupholder can only be used when the armrest is in the up position (unless you use it for a really short cup), and the iDrive needs improvement. If these complaints seem trivial, it's because they are. Overall the car is a great little car that most people would enjoy.
Performance and overall driving experience. The optional folding side mirrors come in handy when pulling in and out of tight spaces.
Better standard stereo, better cupholders, make the ash tray optional, and improve on the iDrive.