I'll be honest, A lot more of it works than I expected. Linux runs and is quite stable.
Keyboard Backlighting? Had to write some Python. Windows driver manages this, proprietary. I still can't get backlight to work in bluetooth mode.
Trackpad Palm Rejection? Had to write a service. Windows driver manages this, proprietary.
Function keys on the keyboard in wired mode? Not supported, no work-around that I can find. I have to remove the keyboard and put it into bluetooth mode. Windows driver.