I bought this because my kids kept loosing their keys (which presents it's own set of challenges). Now they just remember their code and they can easily gain access. When they run out to play, they just push one button to lock the door and I don't have to worry about leaving the door unlocked so they can come back in and I have the security of knowing the door is locked all the time, and you know how it goes with kids, in and out all day long. Multiple codes, easy to program, use a key if you prefer, easy re-key if a key does get lost, anti lock bumping technology, for me it was a no brainer and the perfect fit for my family.