It's been three months and I can't even imagine carrying keys.  The app is simple and flawless. And although there are many things I could say, I deeply appreciate that this is my life now and I never, ever, leave the house and worry about whether the door is locked and that keeps a deeper door closed to wondering if the house is ok.  The need for locks creates a disappointment in the world but this technology frees me from having to think about it. If I wonder, I just check the app and forget about it.