I only have a few thousand miles on mine, so can't speak to longevity.

Tuning is a breeze, I never would have taken the time to get my curve as good as it is now. Changing around at the track, then tossing a street tune back in it takes seconds.

I noticed on my deal, less bouncing around at low rpm, more steady high rpms.

FYI uses a GM points style caps, or aftermarket like Accel or Mallory, which are speced to the GM size.

I would buy one again in a heartbeat.