Logitech's wireless controllers for XBox and PS2 are good hardware.
Cordless controllers are essential for the lounging-on-couch gaming experience. And the Logitech hardware is quality. Sturdy, responsive, long battery life. Game controllers are complex: two analog joysticks, six or more force sensitive buttons, a couple of vibrating motors. Quality pays off.
But what's best about these controllers is they aren't infrared, they're 2.4GHz radio. That means no line of site required, 50 foot range, and the reliability is rock solid. Radio is so much better than IR I'm suprised all quality audio/video gear doesn't use it. Maybe it's the battery life.