I have to say they are amazing, sat nav, music,obd info, bluetooth, streaming, mirror image, front and rear cameras, etc, etc. Sad to say the user manual wasn't the most complete I have ever perused, and as a consequence I have managed the following,-----, radio had 30 presets, I have one, Smooth
all that happens when I select a station is auto search 
----sat nav I can work a bit, but my home address remains in Moscow!!,---the phone I have more or less managed and the disc section is self explanatory, BUT---it's only been in a couple of months, so I may master it by Christmas 