Justin, I have installed a few of the G2216 units in various cars including the wifes epica without an issue.
I did a trial fit in my 09 patrol without any dramas at all, needed to purchase an Aerpro plug and play ISO harness and aerial adapter and worked fine. The DVD in the unit works fine BUT the gps unit needs a lot of work, constantly loses signal but when it does gain signal it works great.
I am in the process of looking for another unit as my current JVC unit's bluetooth is in the blink.
You can have the DVD screen in view of the driver BUT it is not allow to display any movie / tv etc by law unless vehicle is stopped / turned off and handbrake applied hence rooftop / headrest screens. The earth wire for the dvd section is supposed to be earthed to the handbrake and not earthed anywhere else ie chasis etc.
If you are looking doing 1 for the patrol, I would honestly suggest looking at incorporating an offroad gps mapset like Ozi Explorer CE or similar for them like many other providers are doing with the WinCE 6.0 operating systems.
Can always throw a unit my way and happy test out lol.
Good to see another company here to support us Patrollians
Tap, Tap, Taparoo