This wagon version of the Prius offers a very roomy rear seat and a generous cargo area. It's about the size of a Mazda5 but seats five. The extra weight and a less aerodynamic shape take a small toll on fuel economy, but the V still got an excellent 41 mpg overall in our tests. Despite lower gearing, the electric motor and engine have to work fairly hard, especially when the car is loaded. It drives similarly to the standard Prius, but rear visibility is better than the smaller car. A weight-saving plastic moon roof is optional. First year reliability is above average.