I wanted a car that had good gas mileage, was sporty-looking and had a lot of interior room. I have dogs and with the back seats folded down, there is plenty of room for dogs or cargo. The seats are very comfortable compared to some of the other smaller vehicles I have driven. The HHR is perfect for what I wanted in a car.
This car has a lot of "pick-up" for a 4 cylinder vehicle. I was pleasantly surprised, especially with automatic transmission.
The cup holders between the front seats are not placed well -- it is easy to spill a drink. There also is a rather large blind spot area in the windshield -- especially the passenger side.