I did the one that was the Upgrade for the Sync Lock Pick System - I have factory Nav and with this system from Coastal Tech and the second i go into reverse, the color camera kicks on, it has the grids on it with foot markings so I know pretty accurate when I am backing up -
I also think it is Spot On for aligning a hitch - They offered a front camera and I installed that as well - I have that splitter on my STA and sit about 3.5 inches lower in the front than most and when I push the phone button and hold it down, it asks me if I want to view second camera and this little gadget has kept me from curbing my truck or makes me leave the ass haging out in the street - A few other neat things - you can view the rear camera while you are in forward motion, or the front can be set to come on at under 10mph (custom wiring and not supported by Coastal Tech) - 1) you can activate Full DVD Viewing so you passengers can see movies as you travel - great sound system and the driver gets to enjoy while driving.
Navi input - yep, it has it too - and you can enter on the fly - where the normal system is disabled at 4 mph
Sports scores and all the other disabled items - they all work for you in motion -
so it starts at $239 i think and then a little more for each camera - true plug and play - great investment - check out the link