Good model. I did not use weights - for me, the weight of the mouse is sufficient. If the creak had not begun, I would recommend it to everyone. Has some pros: Switching sensitivity, adjusting the mass of the mouse. There is an option to turn off the backlight. Convenient shape and button layout. Due to the shape of the mouse, it can be easily lifted and moved (for example, if the mouse rests on the keyboard and you need to move the cursor even more to the left). With its cons: About two months after the start of operation, the mouse wheel began to creak - it irritates (especially since the mouse costs under 1000). The abundance of settings (acceleration, sensitivity) - it is very difficult to find the right parameters for comfortable work (but maybe this is not a drawback).