I finally have it built in into my car. Is it nice audio player. It has an excellent picture and sound quality. This device delivers one of the greatest screens for 2DIN format (17.8 diagonal). In relation to the specifications, this one is very well priced. It has both an USB and SD card slot.
The operation handling is very simple and logical. An instruction manual is not necessary, even a moron knows how to work with it.
Regarding navigation, as far as I know, you can't put any navigation onto it. You can however have an external navigation via the video input line. But you can't operate it via the JVC! I could be wrong, so if someone knows how, feel free to correct me..
The player plays everything, including copied DVD. What really is important is that it supports DIVX and DVD-MP3. It does it effortlessly (Occasionally, It can load a bit slow, but I can live with it).
Also on Ciao.com under Toysoldier