Have had the Cobalt almost a week now - averaging over 30 mpg already in my commute (17 miles each way). It has a lot of nice features for an "entry level" car. Got the chrome package, love the Bluetooth and OnStar. Adults can sit in back seat - even with my seat back for driving! Manual seat has lumbar adjustment and pumps up and down for height adjustment - NICE!
Really like the Bluetooth and OnStar, mileage will be great - averaging over 30 mpg already! Love the "info" center with tire pressure, oil life, average speed, instant mpg, average mpg, miles til tank empty - it's a fun car to drive, and doesn't get RPM up to climb hills like some others I drove!
Radio sounds "tinny" - but, it's OK - cup holder isn't great, either!