I have installed the system. I have not had the time to play with enough in detail at this point.
The radio reception seems good. All of my usual stations come in well, but I have not gone on a trip out of town to see what kind of range it loses reception at. The GPS/Nav module has a gas miliage function but I have not yet used it. I was disapointed in the media player for the SD card as it seems to lack any way to sort music by way of artist, genre, or even a file explorer to select your music. It just presents it as one long list. The steering wheel controls for phone control I have not completely figured out yet. I seem to be able to hang up on a call and it comes over the speakers as it should. but I've not had any luck initiating a phone call though the buttons on the unit itself work fine. Voice recognition does not see to work anymore as that was likely built into the factory stereo. (not that big of a deal for me though). GPS I think is based on something derived from Garmin. I have not played a DVD yet. The people from Otto Navi told me there is setup menu item that will allow for playing a DVD with the vehicle in motion but I have not found it yet. I have not yet installed a camera. at some point in the future I am planning to upgrade factory speakers and (possibly) install an amp. Need to do more research on this. I have been busy with Home renovations so this has taken a back seat at the moment. I will try to post a detailed review once I have fully learned the system.
Overall impression: Not bad for the money. Nice asthetics, looks like it was a factory unit that was meant to be there, not a retrofit. Install Directions are skimpy and getting technical information from Otto Navi was like pulling teeth. They initially said they don't give tech support or advice and that I should take it to a professional installer. I was persistent with my questions and told them that even a professional installer might have questions because they did not include any technical information whatsoever besides a very rudimentary wiring diagram, and that competitors like Pioneer, Kenwood or Alpine all provide a wealth of technical info. They finally put someone on the phone who answered my questions.