I am often annoyed by the overuse of "incredible" as a term of praise. People have gotten so used to hyperbole that they seem to have forgotten that the word has a literal meaning as well.

If you tell me an incredible story, I won't believe it. I will conclude that you are either lying, joking, or sadly deceived, and rather gullible to boot.

If a movie is advertised as incredible, I would expect some sort of fantasy or at least a comedy, with deliberately unrealistic plot elements. If an allegedly non-fiction book were termed incredible, I probably wouldn't want to read it; I would expect it to be full of cockeyed conspiracy theories and the like.

Most of the time, it is better to be credible.