I admit to mostly having bought mine to have an Amiibo emulator with a screen and a menu that I can pick things from, and it performs this function admirably. I tried to use it to clone a hotel room key but its emulation was unsuccessful at unlocking the door. There is a LOT of functionality available in the hardware that isn't yet fully exploited by the firmware, and development is proceeding at a rapid clip, so I expect the device to only get more interesting as time goes on.