2010 Ford Fusion Hybrid 4dr Sedan (2.5L 4cyl gas/electric hybrid CVT)
Comfortable (I am 6'3" 220). Adults fit in back seat. As for mileage, I did get 700 miles on one tank around town, plotting routes like Patton and driving like a snail. Generally, Driving not so slow as to be a speed bump but not like speed racer, I get 42 around town. As for Highway, it gets considerably better mileage at 65 than at 75 (yes, legal in some states). 65mph avg highway is around 37 mpg. 75 mph avg highway is around 33 mpg. 55 mph avg highway is around 39 mpg. Got the $3400 tax credit so initial additional cost of Hybrid model was a wash. In 40,000 miles, I have saved more than 500 gallons of gas ($1300) over a car which gets 25mpg. Service at 10,000 mile intervals is nice.
Hybrid engine system and SYNC. Navigation is easy, even though there is always room for improvement, and my iPhone 3GS integrates with bluetooth seamlessly for phone and music.
Folding rear seat. Flat folding right front seat. Not a real biggie but would be nice.