I have several colors of Connecting Threads thread, and have found that while it seems to be a good thread, it is a much heavier 50 st. than Aurifil or Superior Threads Alex Anderson's 50 wt. I don't piece with it, but I do use it to quilt with because it is a step heavier than Aurifil, but not as heavy as a machine quilting thread. I think the heavier weight takes up too much space in a seam when you're piecing, and adds more bulk to the seam. I like to piece the most with John Flynn's "So Fine" from Superior Threads.