bought this for my owner occupied home. I am a real estate investor and have used the smart key locks before. I was able to rekey the deadbolt without an issue. It did not work so well on the door knob. neither the old key nor new works. new key works fine in the deadbolt. I am now left with a dysfunctional door know lock. Due to my door holes being incorrectly too close to each other by the previous owner I have already returned too of the sets because there was not enough room between the deadbolt and the handle. I really do not want to completely uninstall and return another one.