Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The bobbin will jam

The other reviewer is right. The bobbin gets loose and jams. Mine even broke. I've emailed Singer and asked for a new bobbin case. Hopefully, they'll do the right thing. My six-year-old did make 1 thing, and the controls are easy to figure out. Threading is just as difficult as a grown-up machine.