An essential aspect of my smart home is door locks. The Yale Assure locks are mostly a full replacement scenario. You replace your entire deadbolt with this new one. Yale is now the parent company of August, and there is a little electronic module that the lock comes with that integrates the Yale hardware with the August brains. These locks are much more reliable than the previous locks. The keypad is built into the lock and as such, shares power with the locking mechanism. I've had these locks installed for a few weeks, and their reliability has been 100%. Everyone in the family has a key code and have not reported any problems.