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

Mine was great, rechargable batteries, MP3 reader, FM radio. Great for travel, and I loved it until it broke. They replaced it, since it was within one year, and I had kept all the paperwork. Then the new one worked fine for a few months, and then broke too. It would be a great product if it didn't break so often. How unfortunate.