Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Loved it, but......

Enjoyed everything about this mp3 player. It was easy to use, and after I upgraded my WMP it worked great with my computer. The battery lasted much longer than I thought it would. On the fourth night I set the sleep timer for 15 minutes and drifted off to beautiful music. The next day, I discovered that it would not turn on, or off, so I changed the battery to no avail. Not wanting to give up, I called Sandisk customer support and after I upgraded firmware and followed all instruction by a very patient, polite rep, we gave up, and he suggested I send it back to Amazon. I would have given it five stars, and Sandisk customer service five stars, except... I have to send it back, which is disappointing and inconvenient. I am ordering the e250.