Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Blue Tooth Headset

This headset works amazingly well. The only problem I have encountered is once in a while the person on the other end complains of an echo on their end. Adjusting the headset up or down or adjusting the volume seems to take care of it most of the time. If it doesn't, I hang up and call back. That seems to take care of it. I even forget it's on my ear until it chirps.