I don't know much about different types of thread, as I only machine piece and mostly hand-quilt. However, I just wanted to say I am glad you had such a possitive experience at Joann's. I am lucky too--I have 2 Joann's within 1/2 hour from me and I am always treated well. I especially like Dan, who works in our Poway store-but unbelievably, neither he or his wife quilt!! The cashiers always try to help me make the most of the many coupons I come in with as well! They seem to be very pleased when I can get great bargains.