I purchased a magic mouse two weeks ago and I am extremely disappointed with how it performs. I have had nothing but jittery, laggy cursor movement since day 1. I've read the support article found here and have attempted to eliminate every potential source of intereference except my 2.4GHz WiFi network. But with no success. I purchased the magic mouse to replace a logitech MX Revolution which died on me after about 5 years use (battery issue). I am seriously considering returning the magic mouse and buying another MX revolution. The only advantage to using the magic mouse is that I dont have to ensure I carry round the USB dongle which the logitech required. Is there a chance I have a bad unit? Or is this a fairly common issue with households who have 2.4GHz WiFi networks?