If you ever sit down and stitch on a Featherweight, you won't need to ask. They are such a joy and stitch the most perfect stitches.
Downer: They can be very habit forming and you get attached to them and then you see another one and it is pretty reasonable so you have to buy it also and pretty soon, you have 5 black ones and a white one. It becomes a sickness...but a happy sickness. :)