Took for 4000 with a little. Half a year of work for such money is a well-deserved one star. Different pros: A very convenient form, side buttons, no delays during operation were noticed, it's like a wired one. Although with mice from other manufacturers, the difference in reaction speed was noticeable. I use a mouse with a desktop computer, the system unit is under the table. Convenient replacement of batteries and cleaning from dirt - a cover on a magnet. Different cons: About six months later, like many others, the left click began to work twice. It is impossible to use such a mouse, extra windows are constantly opening and closing, text is selected instead of setting the cursor, and if you start typing, the selected fragment is replaced. It is not known whether replacing the switch will help, plus disassembling the mouse on your own to get to the switch is very problematic. At least personally, I'm not sure that I can disassemble and assemble everything back without damaging or confusing anything.