They are fun to use. My DGD about wore one out filling bobbins. It was worth buying for her to be so happy 'helping' me. I took literally scores of of filled bobbins to guild for members to use and bring back the empty bobbins so DGD could have them to fill again. The first thing she asked when she came over was did the guild need more bobbins for her to fill? She is older now but still remembers the good time she had using the Sidewinder in my sewing room.