"Crown of Ash and Honor," the sample book linked on the "Start Writing" page [1], seems like a counterproductive example. With "novel-length drafts" being the main selling point for the app, this draft seems acceptable for the prose itself (it's on par with most AI writing) but doesn't really demonstrate novel-length strength.
The story begins with a boy yearning to be a knight in a war-torn fantasy world apparently without magic, then there are extra-terrestrial invaders hunting a technological artifact and he suddenly knows how to fix a shield generator by crossing wires, then it suddenly turns again into a dark fantasy story with corrupted zombie-ish warriors.
On the technical front, clicking on a link in Section 2 of the story's ToC takes me to that number in Section 2.
The story begins with a boy yearning to be a knight in a war-torn fantasy world apparently without magic, then there are extra-terrestrial invaders hunting a technological artifact and he suddenly knows how to fix a shield generator by crossing wires, then it suddenly turns again into a dark fantasy story with corrupted zombie-ish warriors.
On the technical front, clicking on a link in Section 2 of the story's ToC takes me to that number in Section 2.
[1]: https://www.varu.us/books/cm9w5b2jq0001l204f2r10bnu?scene=1