In the last few days, there has been a rampage of indignation from readers in Amazon about some authors acting—willingly or naively—as car salesmen with their novel. One of the thread, rightly so, lamented the hyperbolic definition that some authors use to incense their own work.
I agree with the readers, I am totally put off when I read some of those sales b-class marketeers ramblings.
An author should only describe facts about a story, synopsis like, so that a reader will not be mislead and disappointed.
A page-turner for a reader is a dull brick for another. Never assume anything as an author. Let the readers decide what your story has been for them. So I can tell you what my novel is about, characters, a bit of the plot, maybe why it differs from others in the same genre, but never what it will be for you as a reader, that is preposterous and pretentious.