I have and Avic N1 and a Avic D2. I am not having any issues with the D2. I do share the disks between the two of them. My wife has the N1. A while back, I gave her the disk (70MT) to run an errand and the navi screen froze up. She took the disk out and did it again and it gave the message "preparing to switch to memory navi mode" and below that it says it may take 30 seconds and not to remove the disc. The problem is that it freezes there I have to hold hte eject button down for a while to get it to actually eject the disc. The rest of the unit works fine such the DVD videos, radio, re