I love the car dock although the usb sliding connector should have been made to connect more easily. I have to press it away from me as I slide it to connect.
By the way, I strongly recommend overriding the default car dock app with Car Home Ultra ($1.99 after 30 day trial). Although the default moto car dock app looks cooler, it does not provide the functionality one would want while driving, and the app buttons are not editable so I cannot have certain key apps on the dock screen. Whereas, CHU provides the functionality, flexibility and you can tweak the day & night color scheme to fit your car's display panel. Its overall design could be improved, though. It is still a much better dock app than the moto version.