Like most of the other reviewers, I'm exceedingly happy with this mouse. Over the past few years, I've been happily using Logitech's MX Anywhere mouse, but they have an issue -- they just wear out over time, and start malfunctioning. Logitech actually has a "new, improved" version, which I definitely don't like as much as the older version. I went through that routine the last time I needed to replace my malfunctioning MX Anywhere mouse, and I managed to find an older version, then returned the newer one. But now that mouse is malfunctioning, so what do I do now?
I tried a different mouse I didn't quite like, so I went looking again, and found the M510 Advanced. Oh, this one feels "just right" in my hand. And it actually works with a little "personal problem" I've always had -- I've always tended to rest my "right mouse finger" on the right button, which tends to lead to unwanted right mouse clicks.
Well, look at the design of this mouse -- instead of "the buttons going all the way out to the edges" of the mouse, they are "inset" with a bit of a frame around them. PERFECT! I can rest my finger on the right button, with my finger also on that "frame" around it, and I don't launch any inadvertent right clicks.
So, it works fine, it works with Logitech's "Unifying" hardware and software, and thus with my Logitech wireless keyboard, it feels fine in my hand, and it works with my lazy right mouse finger. Perfect!
Actually, writing this review really clarified something for me: Heck, I ought to buy a bunch of these things while they're available, and hopefully that'll keep me mouse-happy for a decade or two in the future. This one is JUST RIGHT.