My fingerprint got programmed lickety-split. My wife has been working at hers for nearly an hour. She's tried multiple fingers and the darned thing doesn't seem to like any of them. If it wasn't for mine working perfectly we would be shipping the thing back. She's just going to have to keep the key handy. She is very frustrated and thinks it is her fault. Honestly, I don't know. It works great for me. Not very promising if she is trying to get a gun out in an emergency!