I have an MX Keyboard and Mouse. They are great, and I like the flow function where moving mouse off screen can switch both keyboard and mouse to the new device, but cannot get my head around why that same behavior is not possible from the keyboard device keys. If I hit device 1, it only changes the Keyboard whereas it could/should switch both peripherals. I must then flip my mouse and click the button to cycle to 1. Very annoying and would make multi PC experience 100% better, and would entice buyers to but only MX peripherals.