The Acadia has a spacious and quiet interior, with a very roomy third-row seat. It uses a smooth and refined 3.6-liter, V6 engine that returned 16 mpg overall in our test of the similar Chevrolet Traverse. The six-speed automatic sometimes hesitates to downshift when needed. The Acadia is available with front- or all-wheel drive. In our tests of the Traverse we found the ride comfortable, handling responsive, and the interior quiet. Fit and finish is very good. The third-row seats are roomy enough to accommodate adults. Rear visibility isn't great because of a tall and small rear window.