FAIL right out of the package.
The hoarder in me pays off that way- I've always found it hard to throw away any functional parts. So over the years I end up with buckets/boxes of used original (but still good) coils, ECUs, ballast resistors, etc. Sad part is I'm starting to run low on some of it because I've learned not to trust a lot of the new stuff. Some of it may not look pretty or trick, but then "pretty" doesn't count for much when it's sitting on the side of the road. Sigh.