Instruct: Classify the given review into positive or negative sentiment.
Query: Comfortable, Good Sound, but lacking Quality.

I bought these headphones less than a year ago. They were pretty comfortable for the most part. They were also a bit heavy, but still comfortable. The sound quality was decent but after a year they stopped working for no reason. They had been well cared for and never used anywhere but in my home. And forget about trying to repair them. In my experience with Aiwa, their products just don't seem to hold up for long. Very disappointing.