This Yale smartlock works flawlessly once you get past the the tricky install on an older door. Assuming my door might be original (1958) this was a little more time consuming than I expected. Had to dremel out the strike plate trim a little to make room for the slightly larger deadbolt. Make sure you read the directions especially if you have the smart sense feature this must be installed prior to installing the batteries as it can cause damage to the unit. Once I got everything installed and tweaked it works flawless. The app is really issue to use as well as inviting other family members to participate in the program. Installation took about 2 1/2 hours including throughly reading the instructions and the adjustments I had to make. Also due to my house being old I had to drill a 5/8” hole above the trim strike plate to allow the door sense sensor to sit flush as my trim wouldn’t allow for the sensor to be installed with the screw on housing. All in all I love it!