Not OP, but I've used it to clone (my own!) hotel key cards. I've accidentally left my key in the room when I unlocked the door, then absentmindedly tossed the

Not OP, but I've used it to clone (my own!) hotel key cards. I've accidentally left my key in the room when I unlocked the door, then absentmindedly tossed the card onto the dresser instead of putting it right back into my wallet. It's nice to have a backup in my bag. Other hotels have an iPhone app you can use to unlock your door. That's another nice backup, but I've found I can have my Flipper out and the room door open faster than I can open my phone, find the app, launch it, inevitably have to log back in because it's been more than 30 seconds since I last opened it, etc.