I own a 2005 Chevy Cobalt LT 4 Door sedan, and I must say that this car has been extremely reliable. I average about 800 - 1000 miles a week driving on this car for work, and it has held up well. It currently has 166,000 miles on it and no major work needed. I don't care what people say about Chevy and GM, they do make wonderful cars. We also own a 2001 Malibu with 232,000 miles on it. An 2006 Equinox with only 19,000 miles on it and a new 2009 Cadillac CTS. All have required only minor work and maintenance done to them. If you keep up with the maintenance they will be reliable cars. We have twins that will be driving soon, and they will be getting the ever reliable Malibu and Cobalt
Fuel economy is excellent. I average around 30 - 34 MPG with mixed highway and city driving in Southern California.