OneNote works really great if you are the type of person who likes to keep a second binder with all the production paperwork. I used to have a tablet, but I found that function to be non-functional. The writing feature wasn't as sensitive as it needed to be so I gave up on that aspect of OneNote, but organizationally it worked well.
I set up the tabs as I do for any production notebook with all the departments having a tab plus a tab for schedules, contact sheets, check lists, etc. Then I just transfered a copy of all paperwork into the "binder" for easy reference. It was actually very useful in that regards, but it is very simple and wouldn't have been useful for much else.
That being said, that was with the 2005 version on my old tablet PC. Now I have a Mac without OneNote and have not missed it yet. Maybe if they had a nice version for the iPad I would reconsider trying to use it again and fine tune its uses.