I don't backstitch. The quilt I'm working on now is my first time to use Aurifil thread and I am sold. With the thread previously used the end of seams would start to open up, not with Aurifil. I set my machine at 2.0 and leave a small tail, quarter inch. With Aurifil thread the seams lay flatter and I haven't had even one seam start to open up. Love this thread!