I have had my HHR over 1 year and have put about 30,000 miles on it. I have been averaging about 33 mpg that is city/highway combined. When I first saw it I really wasn't that excited about the looks of it. But I decided to take it for a test drive because of the sticker price. Once I did that was all it took. It was so much fun to drive I am a very large person and fit in that vehicle comfortably.
I love the dark tinted windows. I love the fact that I can choice to make a back cover to hide presents or whatever under it. The seats folding flat in back are wonderful! The MPG and info center are great!
Change the locks on the doors so that your arms can be on it without them jamming into them. And more cup holders in a different place.