Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Comfortable and lightweight, but intolerably hissy

I received the headset in a plain plastic bag with no paperwork. The headset bears a "Verizon wireless" logo.I loved the light weight and easy fit in the ear, but unfortunately the headset has a pronounced hiss,especially noticeable when there is no conversation going on (e.g., when dialing, waiting on voice mail,and so on). The hiss is so bad that although I love the fit and the light weight, I won't use it.