I actually have two of these keypad locks.One at a lake condo I've had about two years and one here in my primary home I've had about three months. They make life much simpler. At the lake if you go to the pool or out on the boat I don't have to remember a key. If friends or family want to go i give the them the code that i am currently using. I use two codes. One that only my wife and I know and one that I give to friends,, family or service people. I change the second code often. If an HVAC man is coming when I cannot be there I change the code for him only, often part of his phone number. After he leaves I change it to something else.
If a family member needs to get in I tell them the current code. I make a note of the current codes in my smart phone. Bottom line is it is secure and convenient