During the E3 conference, Sony eventually ditched this boomerang-shaped controller in favor of a controller indentical to the Dual Shock controllers in design, but wireless and with tilt-sensor. Also, the rumble feature available in the Dual Shock controllers has been removed, which proved to be a controversial issue, since Sony stated that the rumble would interfere with the motion sensor (actually, this started when a company named Immersion Corporation sued both Sony and Microsoft for patent infringing on Immersion's force-feedback technology; Microsoft settled out of court, Sony decided to fight back and lost the case), but in contrast, the Wii controller has one built-in.