Hello, I am using an MX Master 3 mouse with MX Keys keyboard. I love the combination because it allowed me to control all of my computers seamlessly. One feature that is very high on my list is to have the ability to assign a button on the MX Master 3 to change profiles. It is annoying to have to flip the mouse in order to access the profile buttons. The MX Keys is great because it has easily accessible buttons for the 3 profiles. I would personally change my gestures button to a profile toggle button.