The rubber on the left mouse button has worn off at the point of finger contact. From the sides, the rubber remained intact. Has been serving for 5 years now. Has pros: Mouse comfort. Compared to other mice, the most comfortable mouse. Although it may seem uncomfortable due to the height. Fabric braided wire. Rubber cover. When in contact with rubber, the hand sweats much less than when in contact with plastic. Work on any surface (except white) without disruptions and inaccuracies in aiming. Soft. Thanks to the software, it is possible to customize the mouse to your liking. Metal legs. A huge plus, as they are not erased, unlike plastic ones. Has cons: For left-handers, the side buttons will be inconvenient. Loud button sound.