I read this today, cover to cover, in an hour. I think I will end up reading it again and again the way I do Sylvia Plath's journals -- dipping in every once in a while to remember, to think.
I'm a little disappointed, frankly. It bothers me that someone so brilliant really was so limited in his journaling. Plus, it feels exploitative to read these journals -- I don't think they were ever meant for anyone to see.
I'm conflicted about them. Maybe my opinion will mature as I become better versed in them, and if so I'll update my findings here.