I'm so happy about this purchase. The installation process was so easy since the app literally walks you through everything. When I had a problem opening and closing the door after installation, the app even helped me figured out that I tightened the screws too much. I adjusted and it worked perfectly! My only complaint is how large the knob is. I know there's a smaller version but you really don't realize how huge it is until you have it in your hand. The best part is how easy it works with HomeKit! Having Siri lock and unlock the door is just incredible.