I have yet to see a bad Novi coil, I heard about a bad batch of them , but never had a failure from one. I do believe a lot of Motobecane owners misdiagnose the electrical failures to this component. Must be because it's easy to replace them. Where most of the time, the condenser or a short is the culprit.
I have a spare one in the garage that I keep rotating on my Machines and so far they always perform.