As opposed to someone kicking your door in????
Or breaking the window?
I work in the lock business. If you've ever tried using one of these devices or a key gun, you will find them very time consuming and difficult to use.
If someone is kneeling down, messing with my neighbors front door lock, I'm asking him why.
We also cut glass. If anyone wants into your home, a glass cutter is simple, neat, effective and quiet.