I bought two of these and if I could return them I would. The first big problem is the range is terrible. If you have a step up to your door and keep your phone in your pocket, the lock most likely won't be able to communicate with your phone. You'll have to take it out of your pocket, hold it near the lock and tap again. The second problem is that the Kevo app on iPhones will randomly just decide to close itself in the background. So you're sitting there with groceries in hand, tapping away at the lock, only to realize that you have to put everything down, dig out the phone, re-open the app, and THEN tap the lock. Great concept, but horrible execution.