For playing MP3 files kept under the My Music folder, or some other folder organized in a similar hierarchal manner. It was developed for quick and easy playing only, not (yet) suitable for creating/maintaining libraries, mixes, or permanent playlists. Works very well for intended purpose, especially if you like radio-like play of your favorite music, but without commercials! Random play of either single songs or entire folder contents (CD), repeat playlist, list manipulation, and file searching options. Very intuitive, most operations performed with a single mouse click, control-tip/tool-tip/roll-over help for everything. A lot of software for the money!