Hello Jim and list, I do use my BP a lot for music files, as well as for audio files of TV programs I have made. That's why I like having large cards. I also listen to books from audible.com. I taught a statistics class last spring, and I used the Book Port as my Daisy player to access the book. I use the note-taker when I meet with clients for my job. And, of course, I do use the speech synthesizer for reading. I get books from Bookshare and Web braille and sometimes scan things. I don't know about percentages. I probably use the mp3 and text features about evenly. I go through phases with books from audible.com. Angie