MJ....thanks so much for your great investigating work. I've posted once already that I love & use their thread, but did not know about the Pro...now I know & since I don't have a long arm I'll keep buying the Essential. I have bought other thread from Quilting Shops (which cost much more), & have had so much lint coming off the thread that I have to constantly stop & clean my machine.
My Viking Designer SE & Janome both love it, & since they love it I do also!