I never knew that I needed a bolt lock like this. It was very easy to switch out my old lock for this. You can tell as soon as you took it out of the box that it was a good sturdy lock. I had a no problems while putting it on my door. I enjoy all the specs this deadbolt has. I love touching it to lock it and the card key to open it. It also has an app you download and you can control it from your phone. I'm definitely getting another one for my back door.