Instruct: Classify Amazon reviews into positive or negative sentiment
Query: After two duds, customer service told me to get another unit!

I received the DS-1 from Amazon, and it DIDN'T WORK FRESH FROM THE BOX! A second (replacement) unit worked for less than two weeks. When I called Fellowes customer service, they said this unit was notorious for having issues with its sensor and that I shouldn't bother getting another...and then offered to "upgrade" me to a unit that costs half the price at Amazon.Also, take note: When I called Fellowes customer service, they were (I thought) helpful and sent a replacement...however, at the time I asked them whether I should just go through Amazon, and they discouraged me from doing so...yet now, when I'm stuck with a SECOND useless machine (just over Amazon's 30 days for return), they want me to pay shipping to return the unit in order to get my money back.Moral of the story: Don't get the DS-1. And if you have a problem (which you will), go through Amazon.