I use both their cotton and polyester thread and have not had any problems with either one. The cottom thread will have some lint when using it, but as long as each time you do a bobbin change you clean things out so the build up is not so bad it works great. I would recommend there thread to anyone. I do have a Queen Quilter long arm and if you have something different I would try one first to make sure it works with your machine before you go and buy a whole bunch and be stuck with it.