This is a great item for emergency lock-out situations. The white color blends well with the white wall where it's attached. Enter a (set by you) numbered code and you get access to a key. This is similar to the lock boxes used by realtors at homes-for-sale, only it is more permanent. Be sure to use long screws (bolts would be better) and attach it to a sturdy surface. It helps to conceal it so it isn't obvious to criminals.
It I have any complaints it's that when setting it, the arrows which indicate if a number has been chosen when selecting a code are very difficult to read.
I never have to worry about myself or family members getting locked out of our home.