This was a replacement for a 2nd generation lock that stopped working. That one used an Apple TV as a bridge for wifi. It generally worked and it never lost the wifi connection. This one has lost the wifi connection twice already and I have had to type in the password to fix it. The app is also iffy on this, as one one of two iPhones I can't set the auto unlock (it just keeps showing the auto-lock screen instead). Speaking of auto-unlock, the old lock auto-unlocked when the car pulled up in the driveway. This one unlocks when I'm right at the front door. So I'm not sure the wifi does much. 

Still, I love not having to have a front door key.