Using Logitech Flow has been amazing with a MX 3 + MX Keys, however it misses one tiny functionality that would instantly make it way more functional: Let the mouse follow the keyboard. Don't get me wrong, the holding ctrl and moving to a corner works, but it isn't that intuitive. The great (1,2,3) buttons on the MX Keys are perfect and intuitive for switching, but it is impossible for the mouse to auto follow the keyboard, an the mx3's switch button aren't that convenient for quick switching