I had a used 1475, traded it in for a new 7550. Loved it! Went to work for the local Pfaff dealer. Bought the 7570. Loved it! Became a Pfaff educator from spring of 1996 to end of 1997. They sent me a 7570, loved it! Sold the older 7570, bought the one Pfaff furnished for an extremely good price.
I only sold the 7550 (with a great cabinet) in 2005 because we were moving from KC back to Jacksonville and moving in with my mother due to DH's extended unemployment. It's hard to go from 3 BR with full finished basement with 2 car garage to two rooms in a double wide mobile home. We sold A LOT!!
All of my Pfaffs were built before the company was sold. I also have a Designer 1 because when I moved to KC from Chicago I went to work for a Viking dealer. I sort of put my 7570 away and didn't pull it out again until about 6 months ago. It still sews like a dream! I haven't tried the embroidery even though I have about 25 cards because I've been embroidering with the larger design field on the D1.
Hope this is helpful.