Used my Rio 600 in the car, it even makes my poor factory audio sound better Yes, I compared the radio and Rio, the sound from Rio is a lot better. Even better than the sound from CD :Q
I used Media Player to convert a whole CD into wma, and loaded into Rio. Seems there is no way to copy from CD to Rio directly. But the good thing is not only did Media Play find the Title, Artist, Author, Album name, and Genre information, it also found the image of the CD cover!