A good mouse, I bought it in principle because it fits well in my hand. Sometimes, when scrolling, the mode button was accidentally pressed, which activated the sensitivity setting. After about a year of use, the sensor began to lag, and for no good reason, because I treated the mouse carefully. Has some pros: Well-chosen dimensions, good geometry, comfortable side buttons, strong cord, metal support legs. Cons: Flimsy mode control buttons, poor location and inability to configure them; a kind of software in which you need to buy additional mouse modes; a strange and unreliable sensor that began to fail just like that.