I'm very happy with my new Impala. I took the car on a round trip Boston- Indianapolis (2100 miles total) and averaged 27 mpg. Plenty of room and power, and the seats were extremely comfortable. I was looking for a large car with good gas mileage, a big trunk and good looks - and you cannot find a better value than the Impala. With employee pricing, the car was just about $ 18K.
Seats, stereo, assembly quality. Plenty of room for all.
In six passenger models (like mine), make the center section a little more comfortable. Otherwise, great job Chevy!