Metaphysics without Truth

Is there any good reason to believe in Nietzsche's metaphysics even thought he himself claims that it is not "the truth" in correspondence with the world? According to Danto, Nietzsche's metaphysics is only valid for Nietzsche himself. However, this answer does not take into consideration Nietzsche's claim for the general superiority of his philosophy. Nietzsche's view seems inconsistent: on the one hand, he claimed all perspectives are equally false in respect to "the truth," but on the other, he regarded his view as superior. This book explains in which respect Nietzshe justifies his claims, that Nietzsche's position is not inconsistent, and why consistency is important for him.