Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Terrible Mastering

The MP3 album, unfortunately, is a real botched up job. The audio is poor on some tracks, sounding like it is overly processed through noise reduction.But, the worst thing is that tracks are not properly trimmed. A few seconds of the end of track 7 is at the beginning of track 8, for example. The end of track 9 is at the beginning of track 10, BUT there is a part of it completely missing.I cannot believe that anyone every bothered to listen to this disaster.MP3's are not returnable (kinda obviously), but there is no excuse for this ever to be sold.