I bought a Logitech MX Master 2S a couple of weeks back and, well, I am quite disappointed in it.

The weird gesture-button you're supposed to use with your thumb is WAY too stiff to be used comfortably, requiring me to really grip the mouse hard in order to be able to push the button hard enough with my thumb, making it a very akward and jarring thing to do and definitely not a productivity-enhancer. Also, the new scroll-wheel? It's FUCKING GARBAGE. It's really wobbly sideways, the ratcheting is unstable, and what's the most annoying thing about the whole thing is that it often takes several spins of the wheel before it recognizes that I'm spinning the damn thing! A scroll-wheel that doesn't reliably scroll is less than useless -- it actually actively discourages its use!