Hi, Liz. I went through several smart locks with my Airbnb, before finding the best that works for me and guests. I recommend the Schlage Encode Smart Wifi Deadbolt--specifically, the one's in satin nickel finish, like this https://www.schlage.com/en/home/products/BE489WBCAMFFF.html, because the keys are much easier to read during both day and night, without having to first wakeup the screen's light, since the keypad background is light. The versions with a dark keypad background had people squinting to see numbers.
The lock's material is very robust and locks/unlocks smoothly. Also, since you can connect the lock to WiFi, you can remotely set specific user codes per guest, with access for only specific dates and times, as well as lock/unlock. Note, it's always good to have a backup general guest code always stored, in case there are WiFi issues and you can't set a new code...just make sure to change the code to a new one after guest(s) check out. HTH.