It takes a few days to get used to the third key, after which the delight only intensifies every day. With its pros: Number of additional buttons on the side Number of additional buttons on top Additional third key Comfortable Has been working for 3 years wear resistant Adjustable backlight with the ability to turn off when idle Logitech, which means it fits perfectly into the software ecosystem in which the keyboard and headphones already live For me the best mouse for June 2022 Got cons: Small bugs with software that can be avoided by assigning 2 or more DPI sensitivities to each mode. In short, if you have 2 or more changes in sensitivity for each profile (or the mode I don’t know how to say correctly), then everything will be fine, but if you have 1, then stupidity with something can happen . I don’t remember what it was 3 years ago back. Perhaps the software has already been fixed in 3 years, but I follow the tradition in the old fashioned way :)