I liked the use of multiple panels to convey a sense of movement in the illustrations. It's a technique common to comics, but under-utilized in picture books. The repetition in the text is good for toddlers. I think that they like to encounter a series of similar situations before the climax of the story. Dubar's writing wasn't amazing, but it was a competently written story for the target audience. Likewise I'm not a big fan of the illustrator's style, but that's more a matter of personal taste than anything being inherently wrong with it.
My daughter really enjoyed the book, though. As a toddler she's not as sensitive to these matters of taste. :)