They are great cars. The SS versions are fun fun fun to drive. They are quick. They are like 270 horsepower. Thats a powerful engine in a little car. I've never heard of anyone having a problem with the cobalts, SS or not. I know the non SS cobalts get around 35 mpg on the highway. I'm not real sure what the SS gets. Prolly not as good because everyones always driving them hard! lol I know someone who has 80,000 miles on there SS, and hasn't had a problem yet. Its not the turbo charged version its the supercharged version. I've driven every type and they are nice cars. All of them are sporty looking, have great power, and are really reliable.