I'm so glad I purchased this smart lock. As an older retired woman, with a disabled husband, I was able to install the lock by myself. When I go out, I worry about my husband falling, and thought the smart lock would be a good idea, in case he needs medical help. If that were the case, the door can be unlocked remotely, for EMS, or neighbors. It's also nice to be able to get inside with groceries, without having to fumble for my keys.