Regarding your AC adapter, was your OEM head unit a 4 speed fan control or a 7 speed fan control?
I have oem 8.4 uconnect, 2016 ram limited, 7 speed fan control, the adapter was a little different, i have cut the plastic on a connector and they fit.
Sound of these unit seems good like the oem, the fm tuner is a biti inaccuratewhen you try to find new stations, I have not problem with the manual search
I replace the factory navigation app with waze and I use my phone as an hotspot for the radio
I think that the price is good for the product, on the invoice for the customs phoenixradio put 150$, I have pay in total 600euros (700$) for the unit with 64gb of memory and 2gb of ram
Only one advice, be careful when you screw new unit on the ram console, the blezel is chinese and you can damage it if you screw too hard
Factory usb works
Factory rear camera works
Factory cd player not (useless for me with these radio)