Originally Posted by ShadedNine
Harmony remotes are programmable remotes with a rather handy feature called 'actions'...a sort of advanced macro.
With a harmony, you can hold down a single button to: turn on your TV, turn on your Xbox, turn on your receiver, and switch your receiver to Video X (for one example).
Makes life so much easier, and can learn signals for any devices that you can find in the rather large online database. You can also program a tv guide into the LCD on most models, but I don't use it.