My review

I've had it for more than I year, use it daily.

What I like about it

I hate that it needs the special Logitech software to work properly
It takes a few seconds for the software to pick up and apply configurations each time it's connected.
The scroll wheel works inconsistently, often when scrolling fast, it doesn't pick up movements precisely or at the beginning of scroll it doesn't scroll at all. And this is not just me, I've seen others talk about this problem on MX Master 3s
Doesn't work with a cable, it's wireless only.
It's expensive garbage.
Bunch of BS unnecessary features

The worst mouse I've had. I wish I hadn't purchased it and I don't understand why so many people like it. That's it.