Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great MP3 Player

I love this mp3 player. It is easy to use and has alot of memory even without using the SD expansion slot. I have about 200 songs on it, which has only used about half of the memory. The radio works pretty good even without the cord being used as an antenna. The battery is pretty good also - it lasts through several of my study sessions for medical school. The only thing that totally annoys me at times is the case. This is because since the case just slips over the mp3 player, it gradually slips off when walking or running if the player is loose. However, since it is really good about protecting the player from scratches & it does stay on when it is in my bag, I'll live with the case.