I have been Beta testing this August Wi-fi Smart Lock for the past few months and I couldn't be happier with it.  The app allows you to control it from anywhere and it automatically unlocks the door for me when I get home.  My children, who are forever forgetting their keys (but are NEVER without their phones!) love being able to get in the house even if a key was forgotten.  I love being able to check the status of the lock no matter where I am and I receive alerts if the door is left open for more than a few minutes, etc.  It is also very aesthetically pleasing and a very welcome feature to our home.