There is no 'piece of mind' greater than opening an app and seeing the Door Closed / Locked red circle. When I open the August app  while away from home, I can rest assured that my home is secure. Pair it with IFTTT and now my lights turn on automatically when I get home so no more fumbling in the dark. Hearing the door lock behind me is so freeing. I love the lock and the app. Plus no unsightly changes to the outside so I blend right in. Little do they know...