I think the 66 was one of the best machines Singer made. Makes a wonderful straight stitch, easy to maintain and easy to use. I use mine for piecing and quilting--it is my go to machine. I have two treadles and a HC and would not trade them for anything. I have several other treadle including 1890 Davis and really they all sew great. The 66 is my favorite machine. But it is like anything else I like Chevy and you like Ford. :lol: Glenn