I have tried to use this feature probably over a dozen times - on personal and work trips. It has never worked for me. My husband on the other hand has never had a problem with it. My app always says - to just stop by the front desk on your way out...it is frustrating as the rest of the app works so well. I asked the front desk once about it and they said to delete the app and re load it. I did that, no help. Now I just leave and if someone is at the front desk I tell them my room number, but often I leave so early around 4 AM or so that there is no one there. I hate leaving my room dirty for so long, when it could possibly be cleaned early for another guest.