it's the quality of campy that makes us love it... you find a 1970 nuovo record derailleur and it's tight and the spring is strong (well sometimes they wear out).

Campy breaks in while shimano (suntour) break down.

I haven't had the pleasure of meeting superbe's acquaintance, but I have come across too many cyclone RD's with worn out springs and sloppy pivots (and therefore worked like crap). Granted the slant parallelogram makes early suntour the best shifting derailleur.