Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beaware of the positive reviews

When I got the vacuum I was really pleased with the purchase. It had powerful suction, and very convenient retractable wire. Trouble is it doesn't last. Maybe two months after buying it is stopped sucking in the dirt. Maybe all those positive reviews were left in the first few weeks after purchase. The one year warranty is worthless to me. I'm not going to drag down to some service center, who knows where to have it repaired.