Iguess I am one of the lucky ones, as I've never had knots, etc. or any trouble with Coats & Clarks thread. It does what I want it to do. One of the premiere quilters I know who has won prizes at Paducah and Bloomington uses it for all her quilting. She uses it on her home machine, not a quilting machine, I think a Bernina, and says it works better than any other for her.