I just got the car dock before I took a 3000 mile trip so I had plenty of time to try out navigation. I had my phone mounted horizontally on my dash. I had one major issue that I haven't seen anyone mention yet. When going over bumps or anything that might cause acceleration force on the phone, the navigation orientation will momentarily switch to vertical and back. When it switches orientation, it blanks the screen and takes a second to redraw. This is really annoying, sometimes the display would flash every few seconds from it switching. I couldn't find any settings to lock the display to a certain orientation which would solve the problem. Has anyone else dealt with this?