Short, no.
longer; I feel happier with them as some people do have degrading spark issues with stock equipment. There are also boosters, I feel by design they aren't so great at all. If there are other replacement coils as an "upgrade" they might be cheaper than these. They might run just as good.
I'm only saying I haven't had an issue, yet, with what I have. I'm saying that I've found the customer service to be good, thus far.