I use Aurifil always. My machine loves it and so do I. If you have a chance, take a spool of Aurifil and a spool of another cotton thread and compare them. There is a lot more thread on the Aurifil spool than on a spool of another brand the same size. That is because the Aurifil doesn't have all the lint that the other threads have. I think that is one of the reasons my machine loves it so much. I swear my machine even sounds better when I am using Aurifil thread. I only buy 2 colors for piecing. One is a light beige and the other is a dark gray. The only time I use a different brand thread is when I am doing embroidery, and then I use Robison Anton or Isacord poly thread.