I have one on the outer security door and behind it is the inner door. For the security door I drilled a hole and used extra support so it's not as easy to pick the lock. I don't know how people managed to lock themselves out during installation, the manual literally says to keep the door open until you test it. Lack of geofencing (unlock when you get close) and Google Assistant capabilities, which seems ridiculous for the price. Throw in an additional $40 remote unlock and lock app that doesn't even work, at least for me, and I give it 3 stars. physical buttons are perfect for purchase on sale. If you're looking for more smart home remote/auto unlock features, I'd think again.
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