I have a spool of about every good brand of thread there is. I ask for samples! They all are as good as the other. At the big quilt shows what thread do I see on most demo machines? Signature big cone 100% poly. On the embroidery machines it's rayon thread, usually FilTec. One Bernina dealer shop I was in, the new Bernina 830 was quilting a detailed big design. When it was finished and everyone was examining the design which was beautiful, I looked at the cone of thread used. It was Coats and Clark rayon. The store didn't sell C&C and when I asked where she bought the big cones of it she got all huffy and said it was for testing.