We purchased it a year ago because our son had problems with Keys and remembering codes. We keep the fob in his backpack so after he gets off the bus he can get in the house. He is mentally delayed so he has problems with remembering codes and we love that he can get in the house even when we forget to open the door just before his bus comes. He loves it because it help him become more independent. It put a big smile on his face just to open the door. AND with the new Android app it great for us also, no more fumbling for the keys. It even works better than the Apple app that made you open the app to the front page before it would work, on the Android you just have to have it running in the foreground. LOVE THE LOCK! Keep up the great work. Only thing I would add is if you could lock the door from any where. Attaching it to your router or something like that. Thanks Again for Helping us make our son more independent!