I've had a wired Mighty Mouse since the day it hit the shelves. Never had an issue and have loved it. Right click works great and I've grown very fond of the scroll ball. Yesterday I finally saw stock for the wireless Mighty Mouse at my local CompUSA so I picked one up. Got it installed and paired no problem. BUT the right side of the mouse responded about 5% of the time Could not configure it to right click or anything else for that matter. Not sure if it's a BT thing or if I just had a bad one - but it's going back and my old wired Mighty Mouse is back in business.