Instruct: Classify Amazon reviews into positive or negative sentiment
Query: plantronics rocks!

I can't say enough good things about Plantronics. Have 2 CS10's. One from Amazon and one from elsewhere. When A small plastic tab that holds the battery in place broke I was sure I was going to have to purchase another unit, or pay to have it repaired. A call to plantronics revealed how customer service should be. Even though the unit was not under warrenty, they shipped me an advance replacement unit free of charge. All that I required was the remote unit and they accidently sent me the whole product. For this 'inconvienience' about a week later I recieved a complementary remote unit. Bravo