Instruct: Classify an Amazon review into positive or negative sentiment.
Query: It is not sound insulated!

I thought that this headphone will help me to listen music in a quiet area such as library. But it didn't! Its' foam ear pads do nothing except make the headphone comfort. In addition the sound spreads from back surface of the speakers. However, the person beside you will hear the sound clearly and you will hear ambient voices.Generally it is not as good as it looks.