We had one as a rental last year in Chicago. It was cool for about the first day then not so much. The seats seemed small and getting in and out was cumbersome. It was the best driving car either.
My dad has one and loves it. I drove it the entire time I housesat for them during their last trip to WDW (about a week and a half) and loved it, also. VERY smooth ride, plenty of headroom (which I need), and quite comfortable.
Well.....I just bought an HHR about a month ago. I saw it on the dealer website, it had everything I wanted on it, called the dealer and test drove it on the way home from buying it and I love it!
We rented one the last trip to WDW. It not only looks like a hearse but it drives like one too. And the interior was odd - very hard, uncomfortable plastic everywhere.
We also rented one on after our last Disney cruise, and drove it back from Port Canaveral to Orlando International Airport.
When we got to the toll booth, DH could not find the control for the automatic window. He had to open the door to pay the attendant, who, luckily for us, was a really nice older gentleman.
DH: Sorry, I can't figure out how to roll down the window in this car! It's a rental . . .
Attendant: Don't worry. I know you'll get it. I have faith in you!"
A few miles down the road, we find a button on the middle console that controls the windows . . .