mouse becomes nearly unusable at times because it looses connection (I am using the unifying receiver on a PC running Win10). It will skip around or not be responsive at all. I finally restarted the computer to see if that would help. Apparently it has not helped, because I went to move my mouse to the Next button on this feedback form, and it wouldn't move until I made a couple of circles on the desk with the mouse. I have no problem on the Mac with the mouse.