I've gone through more wireless mice than I care to count. Battery dies after three months, the dongle falls apart, the scroll wheel gets mushy, or the Bluetooth just decides today's not the day. Six months ago I bought a Logitech MX Master 3S because everyone on the internet said it was the one. They were right ( sort of ), but not for the reasons they think.
Why I kept replacing mice
The pattern was always the same. Buy something cheap ( a Microsoft Sculpt, a Logitech Pebble, whatever was on sale ), use it for a month, notice the scroll wheel losing clicks, then the battery indicator drops to one bar every two days instead of two weeks, and eventually the left button starts double-clicking on its own. Every single time.
I tried vertical mice. I tried travel mice. I tried the Apple Magic Mouse, which is basically a slab of aluminum with a touch surface that gives you wrist cramps after an hour. None of them survived six months of daily coding.
The MX Master 3S — what's different
Three things that actually matter:
The scroll wheel — It has a magnetic scroll ( they call it MagSpeed ). Flick it and it spins freely through thousands of lines. Click the button behind it and it switches to notched, precise scrolling. I use both modes daily. Free spin for long files, notched for code. No other mouse does this well.
Battery life — It lasts 70 days on a full charge. I charge it once a month, maybe. And it charges via USB-C, so I don't need to hunt for a proprietary cable. Ten minutes of charging gives you about three hours of use. That's the kind of thing you don't appreciate until every other mouse you've owned needed AA batteries you never had.
Multi-device switching — Three device buttons on the bottom. I switch between my work laptop, personal laptop, and the server I sometimes plug into a monitor. One button press. No re-pairing. It just works. Bluetooth + the Bolt USB receiver ( which is tiny and stays plugged in ) means I don't even need line of sight.
What I don't like
It's heavy. 141 grams. If you're coming from a 60-gram travel mouse, the MX Master feels like you're pushing a small brick. You get used to it, but the first week your wrist will remind you.
The side buttons ( forward and back ) are too small and too close together. I hit the wrong one about 20% of the time. The gesture button ( press and move the mouse ) is a gimmick I disabled after two days because it kept triggering when I didn't want it to.
Logitech's software ( Logi Options+ ) is bloated and takes forever to open. You need it to customize buttons, but I set it once and closed it. It shouldn't need a background process running at all times just so my scroll speed stays where I set it.
Is it worth the price
It costs about 85-100 USD depending on where you live. In Uruguay it's closer to 140 because import taxes are what they are. That's not cheap. But I've spent more than that on three cheap mice I threw away.
The math is simple. If you're replacing a 25-dollar mouse every six months, you break even in under two years. And the MX Master doesn't break in six months. Mine has been through daily use, tossed in a backpack, dropped on a tile floor, and it still works like day one.
If you code all day, work across multiple machines, or just scroll through documentation for hours ( that scroll wheel ), get it. If you check email twice a day, save your money.