I finally replaced my MX master with the MX Master 4 after the rechargeable battery gave out. I like almost everything about the Master 4, however I had to disable the new thumb button because it is so sensitive that I kept on pressing it by mistake. Unfortunate since on my MX Master I used that button as Ctrl + a (select all).
The mouse fits my hand well and the cover does not get sticky. The only issue I had was that the mouse was used by someone else before. As with the keyboard I purchased. The second one that was sent to me did not have as much wear as the first one so I kept it. It is a real hassle to return and reorder something with Logitech.
Feels great, looks great, clicks great. Made of really quality materials too. The horizontal scroll wheel is fun to fidget with, functionality aside. My only gripe with it is the low polling rate, 125 Hz. I know this is better for battery life, but I'd at least like to change it so that I could use it for gaming if I really wanted to. Other than that, fantastic mouse.
I'm very pleased with the MX Master 4, the 4th mouse in the series I have owned. It operates smoothly and as the previous model have, it fits comfortably in my hand. What I'm most interested in see is how the finish material that my hand contacts "stands up" to long term use. Hopefully it is more robust than earlier models. I'm also interested to try out the enhanced mechanism to set and select program actions more efficiently.
great product. I use a mouse about 10-12 hrs per day and these last for 3-4 years. I am on my 3rd version and each iteration has seen real improvements. I've not seen or used a better mouse in over 40 years of professional computer, engineering and IT use.
Logitech decided to use cheaper materials compared to MX Master 3S. It’s now just super cheap plastic, like you get with the free mouses when you buy a computer. A real downgrade build quality wise compared to the prior master series mouse. Disappointed.