My Babylock and Juky TL98QE both love C&C thread, good thing too because I have lots and lots of it. My Daughter's Brother 1500 loves it too. I also buy Connecting Threads thread, all work just fine. I use large spools of machine quilting thread also. I use C&C and CT threads for piecing and quilting.

My 30 year old Pfaff 1471 will sew with whatever thread I put on her. She's sewn so many quilts I've had to have the motor brushes replaced twice, but she just purrs along quietly enjoying life :o.

I have a new Singer and it doesn't like the Gutterman or any other brand that comes on the long skinny spool. The thread spool either in the horizontal position or vertical position doesn't want to feed off the spool.