The intended audience, my 5 y/o daughter, loved this and hung on every word. She references the story in great detail outside of story time.
The incidental audience, me, found this to be the most boring Unicorn Princess book to date. Cressida uses the same skills to resolve the Unicorn Princesses' issue as she did in Sunbeam's Shine. We also learn that Cressida, in addition to being a master conflict mediator, good sport about competitions, and cheerfully unflappable is also a passionate artist. Puh-leeze.
Cressida is a textbook Mary Sue. My daughter is loving imagining herself in Cressida's light up unicorn shoes. I am thoroughly annoyed that Cressida is flawless, never learning new skills or growing as a person.