Originally Posted by Holice
It doesn't appear that anyone answered my question about the cost factor. All appears to say they are convenient but what is the cost compared to winding yourself.
The ones I've bought at ThreadArt.com have cost about 22¢ each.
If I could find cotton or matte poly in this size and about the same price or a little more, I would rarely use anything but pre-wounds because the convenience is worth it, so far.
And the amount of thread on a bobbin is pretty incredible. I can do FMQ for about 40-45 minutes straight with one of my own bobbins, wound with this fine a thread. When I use one of these bobbins, I can sew for right about an hour before the bobbin runs out. :)