The X5 represents BMW's first foray into the popular sport-utility-vehicle marketplace. Billed as a "Sports Activity Vehicle" by its maker, the X5 is designed to handle like a true BMW. The redesigned X5 is longer than its predecessor and features a third-row seat that is best for kids only. The ride is still stiff and choppy, but handling is capable and secure. Both the six- and eight-cylinder engines are powerful. The shift lever and iDrive driver-interaction system are both needlessly complicated.