If you are still doing physical keys or a lockbox, this is the easiest upgrade you will make all year. A smart lock with a unique code per guest kills the most annoying part of hosting: the late-night "I cannot get in" call. The code activates at check-in, expires at checkout, and you never coordinate a key handoff again. It also means no more rekeying when a code gets shared around. Bonus: you can automate the code into your guest messaging so the guest gets it the morning of check-in without you lifting a finger. Who is already running smart locks, and which ones do you like? Trying to build a list the room can trust.