Funny I have the chalk pens and love them. But I always make sure I have a hard surface under the fabric when I am marking it. Have the bobbin winder and don't use it. Just think its a pain. Looks like we can see why there is a market for these things ... I love my little ripper holder from Fons and Porter. Makes chain sewing fabric pieces go faster when I can just set it there and it cuts one right after the other apart.