Pioneer is known for their good and friendly user interface but they are also known for their ****** nav. I actually like everything about the screen BUT the nav feature. I travel in my car often and use the nav all the time and it always brings me to some random ass place. I end up re-mapping on my iPhone using google maps. If you are looking for a good Nav screen, I hear the Kenwood 9980 with the built in garmin nav is the way to go.
My avic z2 did this when I installed it. I had to put the pioneer nav in learning mode and after it relearned the vechicle it was in, it worked great! I have not used the avic 120bt nav mutch but so far so good. If I am not mistaken the new pioneer z series 110,120,130 use a different interface than the old z1,2,3 series.