I heard that many mice do not cover the sensor and because of this, dust or hair gets on it and the mouse starts to lag. So this will not be the case. Cover the sensor from above with a lens. Different pros: Cheap for its segment, in my average hand lies comfortably, as it seems to me, the side buttons are well located. Original look. Has some cons: The hand sweats, there are unnecessary macros, the wire is quite tight.