Instruct: Classify Amazon reviews into positive or negative sentiment
Query: May not work with your computer!

This walkman has nice attributes and but fails for most people who take music seriously. If you want to continue using a more robust media manager (Media PLayer, Music Match, or Realplayer), use playlists, or have more than a few hundred songs on your PC, the encryption software Sony requires you to use simply will not work. Sony is the only company that will not allow you to transfer MP3s and WPAs to its devices. It converts them to ATRAC to protect copyrights (many of whish Sony owns). The software that handles that is proprietary, badly written, and untested. Furthermore, their software support is really horrid. I strongly discourage this product for most users.