Received the T9 yesterday. Tried the T8 which was ok but not quite there for me and had returned it. There are two problematic plugs to get connected into the head unit; they didn't design a large enough opening on the back of the head unit panel to accommodate retention clips on the two harness plugs. It was a beast to get them in. Again, ZERO instructions and the diagram sticker on the head unit isn't for the T9. Anyone can figure it out, but it adds time and frustration. The T9 feels more snappy than the T8 and music over Bluetooth is seemingly better. The issue I have now is Wifi, Bluetooth tether, and SIM data are all gimped or broken on my unit. Bluetooth has ~0.35 Mbps down/upload. SIM I can't recall exactly but was similar. Wifi was down 15 Mbps and 0.00 Mbps upload (or simply error out), making it totally unusable. Data was much better on the T8 I had tried so I'm hoping this can be resolved. If they can fix it (e.g. point out a setting to change) or send me a better unit then I think I'll stay with the T9.

Confirmed I saw android 8.1 but connectivity is so borked I can't be bothered to download cpuz right now for other specs.

edit: I didn't test Android Auto because I didn't see it installed. I'll explore that if I get the connectivity sorted.

Update: They're going to send out a new unit. If anything customer service is consistently accessible and reasonable.