I'm in the middle of trial runs with Dramatica, Scrivener, and Novel Factory. None really do the heavy grunt work of writing - having an idea, creating a story, writing the story and editing/revising the story.
I've looked at Dramatic twice and each time come away with the thought, "What good does this trial do me if I can't save, print, export, or create a usable file for tomorrow?" Basically an overpriced workbook based on the textbook of the same name. Minimal dictionary, and other technical resources when compared to Word. Huge learning curve, but it does contain a lot of lesson to help a writer learn the ins and out of writing. Off my list.
I actually bought Scrivener four or five years ago, but they no longer recognize my license, so when my last box died and I tried to re-register, Literature and Latte basically told me to take a hike. The index cards are the best feature - places to put short blurbs about characters, locations, ideas, etc. The actual word processor is clunky, and the dictionary, etc., are minimal. Does not provide any editing beyond some basic spelling. It is an excellent tool for organizing, what with tree format, index cards, and split screen writing. Strongest point is it's visual presentation. Beats all the others hands down. It does not handle exporting to non-native files types, such as .pdf, .rtf, .docx, etc., well - every export contains errors that must be found and corrected before sending on to Kindle or other platforms. Scrivener was created for Mac, though, and the Windows versions might be the reason for the problems I've encountered. I think it is fairly priced at $45.00, but fair price doesn't make it a good tool. Maybe I just haven't figure out how to use it. Plus, the loss of license on their end does not give me warm fuzzies. Or even cold ones.
Novel Factory seems, at first glance, to be a toy. Simple screens, limited editing, and just doesn't have much 'bite' to it. Until the writer starts using it as a tool and not a machine for mass transit. Has a logical, step by step approach to writing the story and is helpful in planning and organizing. Exports to non-native files (as mentioned above) is simple and accurate. But, like Scrivener, one can write scenes and keep them organized, even move them around if you've a mind.
I've been using MS Word since its first release and that might be clouding my opinion, but it is a full-featured word processor - probably the best, and it is the most used by writers, editors, and publishers - with some nice editing features (huge dictionary for spell check, grammar, etc.) and the review feature is top notch. Not very helpful for organizing all the notes and character sketches, and other goodies a writer uses as reminders. Not even in split screen.
For me the ideal writing tool would be Word with a hybrid of Scrivener and Novel factory add-in for better organizing and visual presentation.