My bobbin winder arrived and it works great with the cones and with spools. Some spools have a sharp edge which might catch the thread--these I simple file down smooth. I've filled all my bobbins and am ready to go. I would recommend this winder without hesitation. I can set it up, turn it on, and return to sewing without waiting for it due to the automatic shut off. I love not having to un-thread and re-thread my machine.