I rented a Chrysler 200 for my trip to Sonoma last weekend. I found it very comfortable (I'm 6'4") with plenty of room for kids. On the trip I saw a best of 37mpg and averaged 34mpg....that's pushing 75-78mph most the way.
Couple of things I noticed when running around town was the throttle response and 7 or 9 speed transmission felt "odd". It felt like the tranny needed a sport mode, it's definitely geared toward a light footed driver looking for mpg.
Chrysler makes an S model that has 295hp and some sportier features, if I were to buy one I'd be looking at that model....I think it's still gets 34mpg.
Ron Sutton and I had a great aero conversation while looking over the 200. He saw some aero being used that he was pleased with and I, like always, learned a few things.