I have been using Logitech hardware for years now, and I have never been disappointed. Battery life is exceptional, ease of use is outstanding. HOWEVER, I wanted to give this product a 5, but there's one annoying feature that keeps me from doing so. The thumb click for the action ring drives me nuts. I use this mouse for gaming as well, and every now and then I press too hard on the "pad" and the ring appears and makes me lose my place in the game. I have turned down the sensitivity, but it still triggers. I wish I could disable it altogether, but I have been told it can't be done.
This is a great mouse with one flaw that made me return it. The ergonomics hurt my wrist. I had the MX master 3 before this and loved that mouse. Everything about this is a welcome upgrade, except the angle that it turns my wrist. The new design levels out the angle that your wrist holds the mouse so that it’s more parallel with your work surface. It hurt so much I had to return it.
I had the Master 3 before this one and hands down love it more. The haptic takes a bit to get used to, but is so helpful. I like that it’s black so that it hides the dirt better. So comfortable and helpful with its capabilities.
With iPad getting closer to macOS, I expected the mouse to have a good support for iPadOS, but it does not support well. Neither it supports Linux that well. Most developers are using linux distros, logitech should have thought about it.
The MX Master 4 feels solid and comfortable in my hand. I appreciate the context-sensitive controls. Also, I'm glad for the included dedicated dongle. I tried connecting through both standard BlueTooth and the dedicated dongle. I liked the flexiibility of using the BlueTooth controls, but I found that the dongle gave me faster response -- probably because of other device loading through my integrated BlueTooth.
I didn't find this mouse to be very comfortable. The haptic feedback was also a little weird and didn't really feel like it had a purpose. Returned the mouse with no issue though
Great Ergonomics, Better Battery – MX Master 4 Delivers
on May 4, 2026
Posted by: iTechGuy2
from Fort Myers, FL
Verified Purchase:Yes
I’ve been using the MX Master 4 (Pale Gray) and so far it’s been a great experience with no issues to report. Logitech really nailed the form factor—it's comfortable for long sessions and fits naturally in hand. The weight feels well-balanced, not too heavy but still substantial enough to feel premium and controlled.
One of the biggest improvements for me is the battery life. Compared to my original MX Master, the charge interval is noticeably better, which makes day-to-day use more convenient and low-maintenance.
Overall, it feels like a refined version of an already solid lineup. If you’re familiar with the MX series, this is a smooth upgrade.