J D Power Nav System Survey - MMH worst
 

Jan. 2007 PC Magazine page 25
"In a survey of automotive navigation systems by J. D. Power & Associates, Lincoln-Mercury holds down the two extremes. The Lincoln Zephyr sedan ranks as the best amoung the 70 vehicles surveyed, while the Mercury Mariner hybrid is dead last. The difference: The Zephyr uses a newly designed Pioneer head unit, while the Mariner employs a Visteon module with a tiny 4-inch screen, which is samller than the screens you'd find on some portable navigation devices."