[CydeWeys]

There's a few obvious use cases I can think of:

1. If you forget/lose your keys. If you still have your phone with you, then you can use that to unlock it, or if you set up a passcode ahead of time, you can use that too.

2. If you're having someone over and you're OK with them letting themselves in since it'd be inconvenient for you to meet them to let them in.

I've had both of these situations happen to me. Granted, the solution shouldn't cost $700, but a lock you can open with your phone and also email/text someone a time-limited passcode for is useful.