Instruct: Classify a given Amazon review as either positive or negative.
Query: Good Until It Stops Working ...

This product served its purpose effectively (Recording piano accompaniment and occasionally vocals) until it mysteriously stopped working after a year. I would attach the microphone and it wouldn't register that it was attached. If I held the microphone in sometimes it would register. When I tried recording a few songs, it said it was recording, but nothing played back when I listened to them.