I have purchased 2 pioneer units. An avic D-2, and a Z1. The D-2 is in my friends car, and the Z1 is in my Mariner. Both units work excellent. The D2 performs very rapidy with navigation calculations, and plays music with excellent quality. The Z1 performs excellent too, I love the library system for storing music CD's...and it has a multitude of adjustments and enhancements such as a rear cam, Blutooth, and I also have the XM unit installed. I purchased the D2 and Z1 in January, I installed them both, and they are great. I also had a Lincoln Zephyr with the factory Navigation unit.