Just tried using the USB to play audio and the android seems to work fine . Personally I can’t tell a difference in sound quality between using the USB and Bluetooth. Yes Smart tuning provided the unit.
No loss of any functionality. Very happy with the result. The only downside is using the track pad to select a different android app, easier to use the touch screen on your phone to switch between say the radio or your music playlist
Just had Android/ CarPlay retro fitted to my 2019 LC 500 by Daniel at Smart tuning. In my opinion completely transforms the car . Almost completely makes the ridiculous touch pad redundant just about everything is controlled by your voice or the buttons on the steering wheel. The menu button switches between android and the Lexus screen. It’s not cheap at £550 and a bit scary when you see just how much of the dash needs to be dismantled but all put back together with no creaks or rattles.