Leapin Lizard was recommended to us by our realtor, and by the home inspector. They did a fast, commendable job, but the cylinder broke in one of our deadbolts - and they didn't replace it. Not sure what the etiquette is here, I wasn't home and my wife didn't know what to say. They came right on time, and $75 for all external doors/locks is very reasonable. We'd use them again.