Only issue I have with the mouse is the obnoxious placement of the "Windows" key. It shouldn't even exist. I've never heard of anyone SO busy they couldn't move the cursor to the button on the desktop. If it HAD to exist, the placement is terrible for gaming. It took a month and a half or so for me to stop clicking the button during a stressful gaming moment on accident. That would then ruin the moment and perhaps the entire game, because the effect would be the same as Alt-Tab, and switch me away from an active game at a stress point. Not cool.