I can't be bothered with things when they don't work. I'd much rather have someone who knows what they're doing come out and fix any issues. And the guy that this company sent was basically a locksmith god! I mean I hate it when things go wrong, but I have some good know-how. So when I just couldn't make it work, this guy made me feel like a baby in the field. He was nice and was done in a matter of a half hour. He got here pretty fast too. Anyway, the bottom line is this, They are really good and you should use them if you have any type of lock issue.