Hi, I have two touch and sew machines, one is a 600 that was given to me and the other is a 626 that I bought new in the early 60's. They both work great although I have replaced plastic gears in the 626 several times but my hubby did it, it wasn't hard. I've never had any issues with the bobbin winding mechanism although it sounds a little noisey. I don't use either of them much anymore as I have two Pfaff's, both older models and they have needle threaders and needle down which I have come to really like.