Nothing yet, I will admit this car is very new. I'm going to comment more on my impression thus far, and maybe some things that would be considered somewhat subjective.
Surprisingly spacious inside. I'm over 6' and have had no problem whatsoever finding a comfortable seating position.
The car feels much bigger than it really is, and is very comfortable. I especially like the arm rest that came as part of the Premium group. It's positioned perfectly for me (I have a manual), and it can be swung out of the way if you don't want to use it.
That little bubble car is cool. I test drove one, the dealer was ready to kill me when I made it peel out.
Cool little car and surprisingly roomy inside. Even the back seat has a lot of leg room.
I was testing it for the hell of it, but if I ever get tired of my Mustang, I might get the ZX3.