Everything is fine, until annoying problems with the wheel appear. In the first mouse, the wheel scrolled wherever it wanted, regardless of direction. In the second - it stopped scrolling altogether, only a click with the wheel remained working. I'm indignant. Some pros: Great performance on any surface. Economical, you rarely change batteries. Has some cons: The second G603 mouse in a year and a half goes into warranty due to problems with the wheel. Of course, it will be changed, but the inconvenience of constantly having to keep a replacement outweighs the positive of using it. Logitech was the epitome of device durability. But it is no more. Bad, comrades. Didn't want to leave this brand.