I love the lock but here a little to know before installing, #1 you don't need to drill the top hole....... read all the instructions before you start, this would have saved me a lot of time. I stopped and bought a drill bit, after reading I needed to drill then drilled then read it was optional. #2, batteries are not included, I had to stop again and go buy batteries. #3 only one person downloads the app to start with, whoever is going to have control of codes. We both downloaded then Uninstaller then transfered...... big pain in the butt. Then you send them the information for the app and code. The lock works great, it talks, yes, talks you through the process and makes it so easy once you download the app. Besides the real keys, everything is done through the app. My only concern is what if I lose my phone or break it..... Don't hesitate, buy it!!!!!