The Prius is extremely economical, averaging 44 mpg overall, and 55 mpg on the highway in our tests. With light throttle input it can quietly drive on electric power up to 25 mph. The ride is firm yet steady, and handling is sound and secure, but not particularly agile. Road noise is pronounced. The interior is roomy, but fit and finish is just so-so and some controls take a bit of getting used to. A plug-in version is available and typically delivers around 12 miles on electricity, that boosts gas mileage to the equivalent of 67 mpg. But rapid acceleration or climbing a hill triggers the gas engine. When the electric range is depleted, the car reverts to regular Prius performance, averaging 43 mpg overall. Reliability of both versions are well above average.