I've literally picked up the Logitech MX Master 2S about an hour ago.
Using it as we speak and I really quite like it - I've got rather large hands and can see this probably wouldn't be best suited to someone with smaller hands.
Buttons have a decent click, the free scroll wheel is pretty cool & I like the way it's got a "gesture button" on the thumbpad that you can click.
I'll give you some more information once I've started using it in games and stuff if you want that.