I have used C&C for many years, and when I got my TOL embroidery machine, I purchased some for it as well. I use many different brands, never had one specific brand give me any problems. I have run into a single color (or spool??). that I just wanted to throw out the window (better than throwing out the machine) so eventually trashed after many tries to see if it was just operator error. I think some people, with some machines, express an opinion and it goes viral. Other folks, with the same machine, have no problem. They may not be as vocal! I think you have to use what works for you...I try lots of things, use what works, discard what doesn't and go on my merry way, blissfully unaware that it wasn't supposed to work at all. Just me.