F/U Pertronix Ignitor

I have a Pertronix in my car and love it! I forget about it being there. I do carry another distributor in the trunk only because of the commentary on the forums.
My question is: Has anyone on here ever had one fail on them?
I don't want to hear about your buddies cousins wifes Dart. Just first hand experience. Just curious. Things do fail sometimes but I wondered what the frequency of it. Thanks, Dennis