Just got the MX master 3 and MX master keys.

First issue: Logi Options+ beta you can't see the mouse or keyboard just the charge status in the app.

Second issue: When trying to switch devices the mouse gets hung when at the edge. So much that the mouse gets lost and I can't find it. I end up having to push the button on the mouse to send to a screen then the mouse appears again.

Third issue: The keyboard follows but only if I move far into the next computer or down into a second screen for the keys to follow.

I think this is a great idea and product, but so far it is not usable for any kind of person that really needs to work.

Forth issue: No speed controls in Windows to control scroll speed for wheels. I am not sure if they are on the Mac side since the app is broken and doesn't display or allow me to select a device, but at least it tells me each device is charged and connected. LOL

I hope this product improves,