Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Plantronics Voyager 510 Bluetooth Headset

I got a Bluetooth because I'm hard of hearing and the chatty Cathy sound quality of my cell phones never quite cut it. I had the Jawbone which promised but did not deliver superior sound quality; when my puppy chewed the headset I was relieved and replaced it with the Plantronics Voyager 510. This headset is much better. The sound quality isn't as crisp as I'd like but the volume makes up for it. Also, my callers can hear and understand me, which is an improvement over the Jawbone. This headset also stays in place and is comfortable to wear.