I have the Singer 301, 221k (white featherweight) and the 15-91 in original sewing cabinet. I gave my grandmother's Singer treadle to my DD. My favorite is the 301. It sews better then any expensive new machine I have or have I have tested in shops. The featherweight is nice for classes and the Ahhhh factor but it can be finicky when it wants to. The 15-91 runs smooth as silk. When I sew on it I feel like I'm really sewing not zipping through fabric. I wish I had the Singer 301 before I bought my newer machines.