This is exactly as it sounds, a DVD disc that is created with nothing other than digital audio files in the MP3 format. Some DVD Players can play these discs, but many so far cannot.
The only problem that I have encountered by playing an MP3 DVD in my car,is that when you turn off your system (vehicle) it starts from the beginning again.When doing short runs it becomes frustrating hearing the same songs over and over.Thereby negating the benifit for having so much beautiful music on tap.