Edited sentence: Adding to that, its technologically advanced design had not been refined as much as it might have, especially in early production; the FF soon developed a reputation as troublesome.This was not helped by unfamiliarity with the nature of an ABS system; the characteristic 'juddering' of the brakes under heavy braking as the system keeps them from locking up was an unfamiliar one in 1966, and many owners considered it disconcerting if not worse