We are about 6 months in with this lock. As a fairly high end product (based on price) it should be a reliable, efficient and secure product. Unfortunately, the battery life on it makes it unreliable and very inefficient. It goes through 4AA batteries every 3 weeks or so. We've had two separate occasions where the batteries have died suddenly (no phone notification) and we had to go through the back door to get into the house. The keypad itself is good, app is fine - not great, but it works. Also no HomeKit. For the price, wish it was better - but just the other day, wife insisted we get something new...