I have a 7550 and it was definitely made well (the old Pfaff quality) and then I have a newer 2058 and it is definitely made somewhere cheaper (I can tell the difference).
One thing I do not like about the 7550 is the foot pedal. Had to have it replaced once and when DH checked it out he said that it was poor design. The activation mechanism uses a slide connection (sort of like scraping chalk down a bord). It is jerky and not smooth at all. Other than that, the bobbin case busted on me but the rest works well. She is my backup machine to a Babylock (without IDT).