The main reason that I wanted to try out the MX Anywhere 2S mouse was for its Darkfield high-precision tracking, which means that the mouse is supposed to work at 4,000 DPI on any surface, even glass. I found that the mouse does indeed track beautifully on any surface—my couch arm, my knee, and even glass. And not just glass with a solid surface directly underneath, but even a pane of glass suspended in the air several feet off the floor. This is the best-tracking mouse I have ever used.
One small drawback, which I was aware of before I got the mouse, was that you cannot store the USB receiver inside of it, like you can with a number of Logitech mice, including the M525 that I have been using. Without such storage, you have to either leaver the receiver in your laptop, where it might be damaged when moving the laptop (this happened to me before), or finding some other place to store the receiver and hope that it does not get lost.
I had a pleasant surprise on reading the features of the MX Anywhere 25 that reduced some of my concern about losing or damaging the receiver. It turns out that you have a choice of connecting either with the USB receiver or through Bluetooth. It is nice to have that choice. I found that the mouse worked well either way, and that it was easy to pair the mouse with the Logitech Options software (which must be downloaded from Logitech).
I had not used the Logitech Options software before, and found that it was a great way to choose the options for the left/right click, two buttons on the left side of the mouse, the scroll wheel (which also clicks left and right), and a square button on top called the gesture button. The options are basically the same as Logitech software from 20 years ago, but the graphic user interface is much easier to use than navigating through text-based menus. I had not used a gesture button before. The way it works is that you hold it down while moving the mouse forward, backward, left, or right. The default gestures are things like bringing up the Windows menu or task manager or going to the desktop, and the gesture button did work for issuing the commands. I don’t know if I would ever use it, though, as pointing and clicking on the Windows menu, for example, seems just as easy to me. I wish I could assign the key to the gesture button—that could really be useful for things like opening a link in a new tab or window. Alas, that assignment is not possible.
A feature I found somewhat odd is that the mouse uses a rechargeable battery. The documentation says that plugging in the mouse to your computer with the provided USB cable for 4 minutes will charge the mouse for one day, and a full charge will last for 70 days. I don’t see the advantage—the two AA batteries in my M525 are supposed to be sufficient for three years’ use. Seems a little gimmicky to me.
The feature I was most curious to try was the ability to use the mouse simultaneously with two computers, enabling one to copy text or files from one computer and pasting them to the other. This would be the coolest mouse feature ever, if I could get it to work. But here is what happened. First, it seemed that I would have to use Bluetooth connections for both computers, since you can use either the USB receiver or Bluetooth, and there is only one receiver. From the Logitech Options software (which must be run on bother computers for the dual-control to work) documentation, it looked like the mouse should function just like it does on a dual monitor set-up. That is, moving off the edge of one screen will make the cursor appear on the next screen. The trouble was, as soon as I moved off one screen, the mouse would not work on the other computer until I changed Bluetooth channels by pushing a button on the bottom of the mouse. This made moving back and forth extremely awkward and time-consuming. I got this feature to work, but it seems too cludgy to be useful. Maybe there’s a better way to do this, but if there is the documentation does not explain it well.
So, aside from the disappointment of not getting the coolest feature to work well, I was very happy with the performance of the mouse, and I would definitely recommend it to anyone who understands its capabilities and limitations.