Only issue I have is the "Ctrl" button does not sit in the bottom left corner as it should. Sits next to the "Fn" key which I am now kinda used to but its very annoying. Also dont have F1,F2 buttons on top row, have to use fn/alt keys to activate.
Running Ubuntu 16.04, boots in about 10 second, battery life is about 2 hours. Biggest grip is the stiff keyboard requires more pressure than normal, even after 3 or 4 years of service.