Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality control

The first X-Acto pencil sharpener I purchased from Amazon was "dead" within 3 months of once-a-week use, sharpening about 25 pencils, 10 pencils at a time. The motor was dead. Sent it back to Amazon for replacement; no problem with being replaced. The replacement was defective on arrival (it had a loud metal-on-metal screech on the first use). It would still sharpen, despite the screech, and within a day the screech stopped. Now, six weeks later, it has bitten the dust. Can't send it back to Amazon for a replacement, according to their return policies, so I have to deal with the manufacturer. It does sharpen well when working, so I thought I would try one more time. This pencil sharpener has a two-year warranty.