A very large SUV, the QX80 has a plush, luxurious, and quiet interior. We liked the steady, supple ride but found this big barge's handling ungainly. The seven-speed automatic and 400-hp, 5.6-liter V8 provide smooth and strong performance, but it chugs premium fuel, and returned just 15-mpg overall. The tall step-up to the cabin makes climbing in or out an ungracious affair. Cargo volume is plentiful, and there's a usable third-row seat. Handling is cumbersome in everyday driving and doesn't shine at its limits. Electronic safety aids include lane-departure, blind-spot warning systems, and Infiniti's optional Backup Collision Intervention system.