This works awesome. I recently needed contractors to install new carpet and I was able to provide them with a temporary 8 digit code that can be set for a specific time such as Monday and Wednesday from 9 to 3. I never have to worry about making extra keys. Also, with an Apple TV connected to the lock, you will be able to lock and unlock your door from anywhere in the world. So if your kids get locked forget their key and get locked out, you can unlock the door. I also use the app to unlock my door especially when I have groceries or heavy packages to bring into the house. I no longer have to worry about looking for keys in the rain. I just unlock the door brought the app while I'm still in the car. This lock is pricey but I love the convenience and peace of mind. When I'm about to go to sleep, I check the app to make sure my door is locked. Also, if anyone unlocks the door with their personal pin or by using the thumb turn, I get a notification. I like getting knowing who specifically is coming in and out of my house when I'm not around.