and I should think its already been said, but as well as the enormous functionality - especially the outliner and synopses - great for organizing thoughts and structures - I set up when I am writing with my open document on one side and my ‘research’ folder in corkboard view on the other - with pictures and keynotes large enough for me to see as I work. So no matter where I am I can open up my little writing ‘environment’ and get stuck in. its a little virtual world. Great stuff.
Apparently it does nothing for sentence structure.
Apparently not.
Glad you’re enjoying Scrivener. 
Happy New Year,
Keith