Pros: Solidly built, excellent free motion quilting capability
Cons: Satin stitch is not up to par.
I bought this as a second machine since I frequently quilt with friends and did not want to drag my 7570 with me as I had heard the embroidery part of the 70 is sensitive to being moved. The 7550 is every bit as solid as my beloved 7570 and the only practical difference is the lack of embroidery unit (from my perspective). Free motion quilting on this machine is a dream! Dropping the feed dogs is simple and with the attached walking foot, you can choose to disengage or engage it just by flipping it down. When it's up, it is out of the way and a non-issue. When it is engaged, it is solid and provides an added level of even fabric feeding. My only complaint about the 7550 has been trying to produce a good satin stitch. I had to play around with threads and tension quite a bit to get what I felt were satisfactory results. Even fresh from a tune up at the local Pfaff dealer, the satin stitch was not as tight or smooth as the old Viking I used to own. Still, I don't need or use a satin stitch very often so I'm content with knowing that I need to be careful about what thread I choose.