There are all sorts of audio effects you can apply to your music, gapless playback, crossfading, equalizer settings, balance settings (great if you have some headphones which are malfunctioning and one side works better than the other) create playlists. A big one is that you can exceed the Sansa's file limit and use at least a 128gb micro sdhc card for huge storage. Also, you can record the radio broadcasts. With the various theme settings, you can customize what you see in the display to show album name, artist, song, next song, etc. rockbox.org Great stuff, I have been using it for years.