Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Simple and useful

It is really great. Simple to use, and so small, yet holds more than enough songs for my needs. I use it at the gym, where the small size really is a benefit. With 120 songs, I can go two weeks before I have to reload or listen to the same song twice. Also, the 12 hours of batter life means I only have to recharge it at home on the weekends. Beats fooling around with CD's or a larger bulkier MP3 player.