Installation was very easy. Quick key feature is awesome Put 4 locks on one single key in a matter of seconds. Used this in combination with the 913 deadbolt and they fit together on a standard cut door. Only snag is the deadbolt unit battery cover is held on with 3 screws one of which is on the bottom of the unit and therefore too close to the handle unit to access easily. Just omit using the bottom screw and the 2 side screws are more than enough. The handle does jiggle a little but livable.