As minivans go the Sienna is a sensible choice, but it isn't very engaging to drive. Interior fit and finish and controls were improved in 2015, and the cabin was made quieter. The Sienna rides very comfortably, but handling is lackluster. The 3.5-liter V6 is lively and returns a respectable 20 mpg overall. The all-wheel-drive version--the only such minivan on the market--sacrifices just 1 mpg. An eighth seat cleverly stores in the back when it isn't installed in place. That update also brought a standard backup camera, an additional LATCH attachment, and a front-passenger seat-cushion airbag. Reliability has been above average. That and the availability of all-wheel drive are the Sienna's biggest advantages over the Honda Odyssey.