I use gutterman all of the time and all my machines love it. But I bought one of those gutterman 10 packs and the thread in the pack I bought was much lower grade than the indiviual spools. I don't know if I just got a bad pack or what, but I can't use it. My Pfaff won't sew Coats & Clark, but my Janome will if I adjust the tension higher. But I will stick with gutterman because it doesn't fuzz, they have a large color selection, and my sm loves it. Good luck in your thread hunt.