it all works (sat nav, touch screen, AUX input plays iphone with control through the head unit, steering wheel controls) and it sounds great. better sound than the standard unit.... but.... LOTS involved in fitting! modified facia adaptor, modified loom (completely different wiring and plugs!), modified aerial adaptor, gps aerial needed, Aux input plug needed, amplifier interface (unit is pre amplified so causes volume problems without this), spacers on the stereo mount and a lot of time scouring the web for wiring diagrams for both cars to match up wires from different units..... and it doesnt end there
it is possible but it aint easy and as far as i know mine is the only connect unit fitted to a 350z...
have a look about at units you like and start researching but it will boil down to taking the plunge and having a go!