Works great some times. Doesn't work most of the time. About 1 out of 10 tries it will lock with one touch the first time. Typically I have to spend 30 seconds or more trying to lock my door. Not very convenient. I tried all the steps to optimize performance but nothing helps. I purchased this to make security quicker and easier, but most of the time I come home and Door is unlocked because not everyone is as patient as I am trying to make this work.