Yes, I use WriteWay Pro.
I have both Scrivener and WriteWay Pro (WWP). I've written novel length stories in both of them.
Scrivener has some nice features, like SnapShot. It is the software I tried and tried and tried to like, but it's Windows interface is so eccentric and arcane I ended up migrating all my work back to WriteWay Pro. If Scrivener comes out with an updated Windows version, I'll try it, but at the moment I find that, for me, it's not even close to as convenient and easy to use as WWP.
Getting documents back and forth between Scrivener and MS-WORD, which all my on-line writing group use to edit each others work, is a real hassle. In and out of WWP is as easy as copy paste, or a simple export of all or any portion. I can import a whole 107,000 word novel and have it automatically split into chapter and scenes in a matter of minutes.
That said, if you are MAC based, WWP is not an option because it is a Windows only application.
WWP is completely customizable. It doesn't dictate any part of the writing process. The 10 types of note card masters have 'something' on them but that's all easy to customize. I added a new one, Line-4-Scene, and customized the rest.
I run it both on a laptop when I'm away from home, and on a desktop that has three monitors when I'm at home. I've spread WWP out (dragged the main window) over the three monitors, research on the right one, outline (chapters and scenes) and composition on the middle one, character development window on the left. Going back and forth between them is as simple as moving my eyes. If a new book or story idea hits me, it's about a 10 second job to open the new story idea window, make a couple of notes, close it and write on in the current WIP. The same story idea window is always there even in different projects so it's cumulative and the ideas are all in one place.
The spelling checker on WWP leaves something to be desired so I don't use it. Other than that, I have few complaints.
Writers and their processes vary all over the map. Some like sticks in sand or charred sticks on birch bark, others a dipped quill pen on parchment, some a pen or pencil on paper, others a simple text editor, some WORD or an equivalent word processor. There's probably somebody someplace trying to write a novel in Edlin (talk about punishment). I know one person that likes to write on an iPad. She's pretty fast with it too.
I like WriteWay Pro for writing, Aeon for tracking timelines, Edraw Max for diagrams and flow charts, Scapple for quick and dirty mind maps, MS-WORD with change tracking for revisions. It works for me.
Your mileage may vary.
Fitch