I had a few queries before i purchased and they were answered very promptly, once i ordered the system, itarrived much quicker than expected, given it was being shipped to the UK. There weren?t any instructions, or diagrams included, but again queries were answered immediately and a photo of the unit interconnections was attached.
The quality of the unit is very good, and the system looks great in the car. It connects seamlessly to phone wi-fi hotspot, allowing for any additional android auto apps to be dowloaded and installed, direct to the unit.
I chose wired apple carplay, since i have the phone on charge in the car anyway, to use as sat nav, and that displays perfectly on the large clear screen.
Although it did come without drawings or instructions, queries were answered, and technical support provided, very quickly, i would have no hesitation buying from them again