So far I haven't been able to coax my factory unit to play ANY of the CDs that I have burned, even though they conform to CDDA/Red Book standards. I haven't tried CD-RWs yet. I know that some players that refuse to play CD-Rs will work with CD-RWs due to the different reflectivity.

The fact that the radio won't play MP3s was a disappointment, but only a minor one.