The experience of using is small. less than 5 hours of use, the thumb began to hurt a lot. I thought it would pass, I took breaks, even kneaded my palm with an expander - it didn’t help. By 10 o'clock the pain was hellish, it began to reduce the palm. The mouse seems to be too small and at the same time too heavy for my hand. You can still get used to the weight, but the small size is very difficult. In general, it is unrealistic to use. I wanted to take it back to the store but they didn't accept it. I contacted Logitech (request number 08217305) - they sent it far, to the consumer rights protection society. The software is very confusing, there are not many functions (switching profiles in PC memory, only in mouse memory, and macros in mouse memory are very limited in functionality). In general, the mouse is expensive and not for everyone, be careful when choosing. If you still decide to take it, I advise you to stick a film or some kind of polyethylene on the legs so that there are no scuffs, then you can return the mouse to the store even after many hours of use.