I have the Pioneer AVID-F900BT unit installed in mine (arranged by Nissan before delivery). With reversing camera it added $3,000 to the vehicle (basically Nissan wore the cost of fitting). The camera is mounted inside the keyhole in the tailgate.
It's very bloody handy - I'm not going to try and haul my 1.8T van up to the back of the Navara so I can connect it, I want to position the ball under the receiver and just lower the van onto it. With the tailgate well and truly in the way of things, a camera was my only choice and it works beautifully.
As for the software, it's a Windows CE device running Pioneer's custom menu system and Igo's navigation software which is not bad, the TTS (Text To Speech) system works better than some others (like Tom Tom) and the thing does plan its routes better than other devices (like the NavMan, which says that Canberra is down a little dirt road just south of Mittagong), turn off the highway here please).
It has its foibles, but I bet any of these Windows-based systems would suffer the same. You MUST let the thing boot up before doing anything with it, which includes putting the vehicle in reverse. If I don't allow Windows to finish loading its device drivers before I put it in reverse (activating the camera), when I try to use the system I usually find that it's hung, or erratic. I also cannot sit with the ignition in "Accessories" listening to the radio while I wait (say, at the doctor's), and then just start the car to take off - I have to turn the car off, wait for 10 seconds, then start it. If I don't, Windows doesn't load its drivers properly and the device fails to function.
So in short, if you're mindful of the need to always start the vehicle from a fully powered off state, and wait until you can hear the radio/MP3 player before you use the reversing camera, the unit is pretty good.
Map updates are stupidly expensive, someone is making good money on those and they miss some things that are ridiculous - I can't locate Hamilton Vic in mine (or my wife's brand new Tom Tom either). We could see it on the HEMA map inside Camps Australia 4, but neither of our navigation devices would take us there. Once we arrived, we observed that this town hadn't sprung up overnight, but we breakfasted in a little cul-de-sac with an old steam train set up for display.
I'm still looking for an editor for mine, as the asking price of $240 for an update is ridiculous, I contacted the company and they told me that I had the latest maps, which missed on a local roundabout that had been there for 2 years and tried to tell me there was a hard left turn just west of Branxton in the middle of a straight stretch of 100km/h road.
Good luck with yours. There are cheap Chinese units on the market, I have no idea how good they are, or up-to-date their maps are, or how they can be updated.
