I have this machine and I absolutely love it! I have not had any bobbin issues. My husband got it for me from e-bay. He checked with the seller and felt she was a reputable seller. I have not had any classes. For sewing, quilting, I really have not needed them. I just read the manual. I would like some classes on embroidery. I have done embroidery using the basic designs on the machine, but I have not imported designs and stuff like that. It's just a matter of getting in there and figuring it all out. It's a great machine. Expensive, yes, but worth it!