I was looking for an app that allows one to visualise a complex hierarchy of files, and link pages between them, while writing, and Outline does a beautiful job of that. I also appreciate the live wordcount feature at the bottom of the page, and the ability to color code files. The greatest attraction, though, I have to say, is the interface. It makes the original OneNote look like Gollum.
For short stories and blog articles, I’ve completely moved camp from Scrivener to Outline, and have been far more productive since; now, Scrivener is a *beast* and still invaluable for big, complex projects, don’t get me wrong, but Outline just has a light, fun, yet professional vibe to it, and personally, just makes me happy to open up and start working.
Features I’d looove to see in future upgrades: the ability to change fonts and the default format presets and, one feature I’ve longed to see in OneNote for years as well: the ability to style individual text boxes (ex. bg colour & outline), to make them stand out (and save presets for those too), as well as linking text boxes visually with angular arrows and envelopping clouds or "magnetic backgrounds”. That would definitely put it at an advantage over OneNote :P
I did experience the occasional synching slowdown/error between Outline and OneNote/SkyDrive too, but nothing tragic yet, and nothing that wasn’t fixed by a re-click of the sync button. Since this is not an important feature for me, personally, I did not remove a star, though I’ve stopped the sync process altogether. I just use Dropbox.
As far as the version I’m currently rating (3.5.1), spellcheck, hyperlinks, full-screen and tables (I’m gleaming over a few discontent reviews below here) are all available :)