I already have the Bootleg 1-3 series, and there are many of the same songs on the Witmark Demos...but also a fair few i'd never heard, so this was definitely worth getting.
What can you say about Dylan in these early years? Absolutely incredible that a 20-year-old could write 'contemporary songs' as he liked to call them (as opposed to 'protest' or 'folk' songs) such as Hollis Brown, Death of Emmett Till, Masters of War, etc, and perform like a world-weary blues man.
Also great are the humourous songs that provide some light relief after the gravitas of the above. Talkin bear mountain picnic blues and Talkin John Birch paranoid blues are both comic gems! Even the outtakes are great, giving a glimpse of the young, enthusiastic, eager-to-please Dylan, with a a million songs on his mind ('I've written down all the verses for ya!', 'Do you want this?' - halfway through Let me die in my footsteps - 'It's just that it's kinda long...well it's not that long, it's just kind of a drag, ya know? I've sung it so many times!').
If you're a Dylan fan, buy it, you won't be disappointed. If you're not, buy it, this is a great doorway into Dylan's music!