There are plenty of places to get keys copied in the Madison area, however, this little spot is worth going out of your way for.
I have had to get some very odd keys copied and the woman who has always helped me has been phenomenal. She goes out of her way to ensure she is using the correct encryption to make sure I do not have to make a return visit. Service is fast, friendly, and more importantly the most reliable I have have found across many cities.
Highly recommend for any re-keying or copying service!