Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Echo... Echo... Echo...

When using the headset, I get constant complaints from people on the other end that they hear an echo. The echo goes away if I turn down the volume to a such a low level, I cannot hear. I suspect the problem is related to the unit not being very secure to the ear. The unit constantly flips away from the ear. The gap allows sound to feedback from the speaker into the microphone. It also almost falls off my ear constantly. When on a call, I often find myself holding it close to my ear to keep it from falling off. It has become so annoyingly loose, that I quit using it.