Originally Posted by
Prism99
I like Aurifil 50wt 2-ply for piecing. The reasons are several. It is a finer weight than regular thread, so my bobbin holds much more of it making bobbin changes less frequent. The fineness of this thread makes for a very flat and accurate scant 1/4" seam for me. It is not linty, so I have to clean out the bobbin area less frequently. A spool lasts a long time.
I use Aurifil for all of my piecing for these reasons and buy it on cones.
For quilting my machine isn't picky and I mix threads on the top and bobbin all the time.