Instruct: Classify a given review into positive or negative sentiment.
Query: Looked Good, But....

I read many reviews before purchasing this product. Once I got the 640, I had difficulty getting the pocket charger and the AC charger to connect. After I got them to work, I did not see the problem again.Pairing with my Audiovox PPC-6600 was a breeze. However, there was static when the phone was on my belt and the headset was in my ear on the same side as the phone.The gel earpiece is wonderfully comfortable and the 640 is very lightweight. The earpiece audio quality is great and the volume was very good.However, everyone I talked to commented that I either had a cold or was on an echoey speaker phone. No one thought the audio quality was good.Plantronics tech support confirmed that this audio quality is inherent in the design. The pocket charger is really great. It gives me a place to put the headset when not in use and it charges the headset between usage...very nice.I really wish Plantronics would have put more effort into improving the audio quality.