Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This completely sucks

The sound is horrible... people say I sound like I am in a muffled tunnel. And I bought two, to have in case the BT ran down.... poor me..... And my Plantronics 620 works like cr*p too. No noise cancellation worth a d*mn... forget about using it when driving a car.... I am trying to find a new one...