I'm with you, gollytwo! It not only works perfectly well with other threads, it makes a flatter seam when pressed to one side because of it's lighter weight. I have washed it, ironed over it, and tested it's strength. Winners in all categories. I have also quilted for many years, and by process of elimination have changed my ideas many times. When something new comes out, try it, then make up your own mind about using it, whether it's thread, fabric, machines, etc! Bottom Line does work better in some of my machines, but not so well in my older ones. I love not having to wind a bobbin so often.