I actually returned this mouse because I found it a bit "bulkier" than I preferred, but that's just "personal preference" rather than any knock against the mouse. But I can certainly write a review and put this mouse into perspective:
Over the years, I have certainly come to prefer Logitech's mice. Frankly, my favorite mouse for many years has been its "MX Anywhere" mouse, a rather spendy mouse that has one slight problem: It just plain wears out over time, and starts malfunctioning just enough to make life miserable. And actually, Logitech has come out with a "new, improved" version of that mouse, which I tried and definitely didn't like as much as the older one. I was able to find one of the older ones the last time I needed a replacement, but that option is long gone by now. So, I thought I'd give this one a try.
It's certainly not a bad mouse in any way, and it has the novel feature that allows you to use it with three different computers over Bluetooth. Though, I have to say that I usually use my notebook computers "along with my desktop computer" -- my normal usage means that I really do need a different mouse for each computer. Otherwise, I suppose this feature has got to be worthwhile to a lot of other folks.
I went through an interesting little setup routine when I installed this mouse on my desktop computer: It's "Bluetooth," and my computer doesn't have Bluetooth. But, since it showed that it comes with a dongle that has a Bluetooth logo on it, I figured I could indeed install it on my desktop computer.
Well, surprise number 1 came when I went looking for the dongle -- the package just shows a PICTURE of it, and in fact it's contained within the mouse, under the slider you have to pull out to change the battery. This is one of those things that the "pictures-only" instructions could have clarified in a couple of seconds, by using just a handful of words. But no.
Surprise #2 came when I plugged the dongle into my computer -- I got an "Oh, no, you can only use one dongle at a time." I still had my old dongle plugged into the computer, because I also use a Logitech wireless keyboard. In the end, this is all part of Logitech's "Unifying" hardware and software, and what I finally comprehended was that all of those "Unifying" dongles actually HAVE BLUETOOTH -- I didn't need to use the new dongle at all, as my old one provided the Bluetooth connection I needed.
Ultimately, though, I wasn't quite satisfied with the feel of the mouse, and I wound up returning it. Not only was it a bit bulkier than I preferred, but the buttons weren't quite stiff enough to deal with a little personal issue I've always had: I always tend to rest my "right mouse finger" on the right-side button, which often leads to unintended right mouse clicks. Like a lot of mice these days, this has "nothing but buttons" all the way to the edges, and the buttons weren't otherwise stiff enough to keep away the inadvertent right-clicks.
In the end, I found a different Logitech mouse -- the M10 Advanced -- which not only felt better in my hand, but also has the buttons "inset" inside an outer shell, which really allows me to rest my finger without activating unintended right clicks. So, that one was "just right," instead of this one.
So, that's my story. This is a fine mouse, but I prefer the M510.