Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great while it lasted

The first six weeks that I owned the headphone were wonderful. I have never experienced such full, outstanding sound quality at this price point, particularly the strong bass. I liked the snug fit too. Sadly the left channel suddenly stopped working a few nights ago.I have taken good care of this device (it hasn't suffered any trauma) so I am quite disappointed by this turn of events. After careful consideration I have decided to look to another make for a replacement.