Perfect, sleek Apple HomeKit compatible KEYLESS Lock! There is NO Keyhole to bump or pick! Once set up, you DON'T need your phone or a fob on you to Lock/Unlock the door which is what a lot of the others require.Installation: Easy to install in an existing standard deadbolt door hole. Remove old deadbolt, install new stuff, per instructions. I personally didn't have to change anything. Comes with three different depth depth screws for attaching the exterior touch keypad to the interior locking/network mechanism to accommodate most all door thicknesses. I used the medium(black) ones in my set up.Set up:Pretty easy, just follow Yale Secure app instructions (download and login first), Need to Set Up Master Code first, I believe.Two minor issue during set up, not enough to lose a star:1) Instructions are little confusing on the initial "Master Code" Setup part due to the way the instructions are written (maybe the video from the BILT website/app is more clear?), but once that was over it was pretty straight forward. Hint: after covering the key pad with your hand, press the "Gear Icon" before trying to enter your Master Code. The audio makes it seem like you enter it immediately, but you need to hit the gear icon first. Then it will prompt you the rest of the way. To set up User codes -> Use the app, much easier! ("Yale Secure" is the correct one, I know there are others out there even if you have other Yale smart locks you need to use the Yale Secure App, I believe) 2) Not super clear that you need to touch the keypad with 2 or more fingers or back of hand to activate it before entering Key code or that covering the keypad with you hand (after all set up is done) will lock it AKA the "One-Touch Lock". Some of the advanced setting functions are not explained very well in the app, but are in the documentation if you dig a bit. HomeKit integration with the iM1 module version is flawless, follow the instructions on setup in the Yale Secure app and it'll show up in Apple "Home" in HomeKit under "Default Room" and you can go from there adding it to scenes all that jazz.Improvements that would be nice, but not showstoppers:Show what keycode was used to unlock the door in the notification, instead of generic "Front Door Unlocked" message. However,this may just be a HomeKit limitation and an easy software update (Get on it, Yale & Apple!).Overall: Great smart lock with HomeKit integration that doesn't have a keyhole or require a fob or phone to unlock. Slim and sleek keypad design looks great even on our craftsman bungalow door, doesn't take away or try to be too 'Edgy'. Works great day to day once you get over the few set up issues that an be cleared up with better documentation. Leave the keys and phone at home and go for a distraction free bike ride or walk!