This may surprise some people, but it turns out that even the World's Best Sewing Machine can't overcome operator error. Case in point: I had a "new" machine needing a dust cover (made from a thrift store pillow case with the seamed long side cut, then hemmed, and then the otherwise open short side sewn closed). I was deciding on a machine to use, and went with the World's Best, well, because it's the world's best. I loaded up a bobbin and thread, started sewing, broke a needle, replaced sewed, broke another needle. As I was digging out the tip of the second needle I noticed that someone (who shall remain nameless) used a 66 class bobbin instead of 15 class bobbin. When the correct bobbin was used I was able to finish the cover.
I believe a strongly worded letter is in order to the manufacturing company advising them that if this was in fact the World's Best Sewing Machine there would be a mechanism in place to prevent such mistakes as using the wrong bobbin.
Anyone have an address?? Janey??