I bought this mouse about 2 years ago. Bought for software with macro capability and battery-powered wireless connectivity. During this time, I soldered the microswitches on the left and right mouse buttons, since after half a year double clicks began, there was nothing to really select and drag with the mouse. I changed the microswitches to similar ones only made in Japan, for more than a year there have been no problems with them. At the moment, problems with scrolling the mouse wheel have begun, since the sensor there is not optical, but mechanical, it began to jam and there were problems with scrolling. The product is generally good, it's a pity that Logitech began to save on high-quality components.