Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 3 of 8 are defective

We just ordered 8 of these for our small call center operation that we started on Monday. By Thursday we had to 'jiggle the wires' to get them to work, and 3 now don't work at all. I came back to the site today to figure out how to return them. If you intend to use headsets heavily, try another model or brand.