I thought it was pretty good, but nothing special. It's a neat, though
not really unique, world where dragons transform into human form and
live in a tense alliance with humans. There's all sorts of heavy handed
shades of prejudice, fear, and related racial issues. There was a prior
war. There is an impending war.
See? None of that is very unique or amazing, so I definitely am not in
the camp that hails the world building as something uniquely special.