Scrivener seems like the program to beat out of the four. JNW has a very nice way of handling margin notes (very, very nice) but the outline and document views don’t always seem stable and intuitive. Ulysses and Copywrite have weak organizational features, in particular lacking good hierarchical outlining. That said, I like Ulysses colored tagging (sort of like a code editor), but not enough to pay the insane price they ask for it, and Copywrite had by far the sexiest full-screen mode, but the others were good enough that it didn’t matter. (I should note that I understand Ulysses had great export options; however, these are locked out in their demo, so I couldn’t check them out.)
None of Scrivener’s features or functions seems too counterintuitive or unstable to use, it seems to do everything okay and some things quite well, and has a nice index card/storyboard view that the others lack.
