In my Astra J the adapter fits very well and he has only minimal play, slipping an out is definitely not possible.
Once the adapter has power, lights a blue LED, this is not too bright to happiness.
The two USB ports are not sitting too deep and provide the USB cable good grip.
The shop works flawlessly and excessive heat build-up, I could not tell.
Whether mobile or Power Bank, etc. everything was loaded.
Even with the loading speed, there is nothing to complain about and therefore I am very satisfied.