dm, that's because your wireless mouse is probably a laser running at 2.4Ghz, same as your headphones maybe, and router and most wireless devices now (very overloaded frequency for todays market of technology). My wireless is amazing, and I am just using a Logitech M510 and with the Setpoint setup, I have accelerated speed enabled for games, no lagging, and is this lag on the laptop? That to will cause issues as I have seen it, it happens on my wife's laptop constantly, changed my phones and bought her an optical, not laser, wireless mouse that uses different frequency, plus phones are 5.8Ghz and router not near her laptop, work great now, more responsive then before. But nupe, everyone will have pros and cons, mine are all good now, but changes were needed. PS, I have used wireless mice since the first Logitech came out with it, I still have a Logitech Sensa PS2/Serial mouse from 1998 and it works great, still have my wireless Logitech keyboard, all work fine. So it's all dependent, if you set the speed fast for your mouse, enable settings in game, you will see a difference, of course set this speed to your comfort zone, I move my mouse a 16 of an inch either way and my cursor goes from one side of screen to the other almost instantly, can get a little fast in games like EQ, EQ2, Skyrim, and some shooters (had to actually turn mine down in MW3, was turning around 360 with a nudge and kept getting shot in the back because of over spinning) LOL