New in 2009, the 2010 version of the Ford Flex comes with the option of an EcoBoost engine. Cars.com reviewer Kelsey Mays gets behind the wheel to find out how EcoBoost affects the acceleration and ride quality of the large crossover. Furthermore, he explains how it compares to those big V-8 SUVs; the difference between the two might depend on whether you’re a “hauler or a driver.”