I have sewed on the older machines and I liked the stitches really well. But the problem for me was they were always messing up somehow. My Bernina Aurora is a dream to sew on and I will eventually get rid of all others. I know that many of the vintage sewing machine owners say their Singer 15-91 are perfect to piece on. I have one and used it but it still messed up too often for me. I have had my Bernina in the shop just once in 9 years and that was a minor issue.