This is the easiest setup I have installed. This worked great on a garage entry door. No modification was necessary for this. It was a direct swap. The Smartkey feature allowed me to key to my existing keys. It was an easy process. The instructions made it simple to figure out. The only issue I had was a little bit of sticking at the strike plate, but that may have been due to old versus new hardware differences. I highly recommend Kwikset!