The HHR shares the same platform as the Chevrolet Cobalt. It has easy cabin access and a flexible cargo space, with split rear seats that fold to create a generous and flat load floor. The ride is comfortable enough, and handling is secure but not agile. The HHR feels lethargic because of the tall gearing and the slow response of its automatic. We got 23 mpg overall with the noisy 2.4-liter engine. Visibility suffers because of the short windows and thick pillars. The window controls and rear-wiper switch are poorly placed. For 2009 the window controls will be moved to the armrests. Interior quality is unimpressive. The 2LT and SS have standard stability control. Reliability has been average.