It's cool but not magic. If you're trying to fuck with something, you need to know what frequency it's on and what sort of signals do what. There is a bunch of preloaded stuff though, and a wide variety of tools like radio frequencies, nfc, Bluetooth, rfid, and infrared. So far the most useful thing I've done is turn the volume down on fox News on tvs in public areas.

Oh one thing I still have to try: some, maybe most handicap buttons for doors are actually radio frequency based and not hard wired, so if you can capture and replay the open signal, you could open a door without hitting the button and look totally jedi.