I have one of the USA spec adapters in my BMW. It works pretty good and has cd quality sound, but it does not compare to an aftermarket radio. It is limited to the capabilities of the Ford factory head unit.

I'm not certain of how controls on the factory ford radio would work for controlling an ipod, but I do now that on my E39 bimmer, it is a pain to change songs on the ipod using the radio buttons. I usually just put it in stand alone mode and use the ipod to change tracks.