I have the 7570 so cant help on the 7550, unlesds it is to say Pfaff's made in Germany are really great, love the IDT for piecing and quilting, love the stitchs, how quite the machine is, and how they give me no trouble! LOVE the older Pfaff's!!!
my machines use a card for the embroidery, ( I have 3 Pfaff 7570's) two other Pfaff sewing machines and a Pfaff serger,