Sometimes it is lagging yes. But i will test after a firmware reset.
I also had the problem that it sometimes it goes to stanby and sometimes it starts from 0, cold boot.
Maybe my unit is just faulty.
Now i have installed the Teyes CC3 and i am very happy atm.
I will recieve later this week a DAB+ dongle so will have tested that, together with a sharkfin antenna.
, what you mean with poor reception, that looks more like a problem with the antenna or the DAB USB stick then the HU itself.
I can't confirm lagging and restarting by itself, my HU is working very stable, had over the last 3 months no problem at all, never had a crash.
Cold start I use because booting is very quick, sleepmode caused Google app related problem in earlier firmware on my HU, don't know how that works now.
After modify the microphone and the cooling fan, I'm more then happy with this unit, also claimed money back, it is not Android 12, but Android 10, so only paid 100 Euro at the end
I have a S8, the Opel version, different front and 1024x600 display, Canbus, steeringwheel buttons works fine in my case.
Also realize that it is a cheap HU, don't have experience with other HU for the same money, so can't say if you can buy for the same money a better one, just that I'm more then happy with my HU, it does what I need, but that is a personal experience, Sygic navigation also works stable.
We had montly firmware updates so far, never had really firmware related problems myself, I'm not using Android Auto, just bluetooth for making phonecalls and using my phones hotspot for internet, have no 4G connection.