Well, the source material is an multiple Oscar-nominated film with critical raves...so yes, I'd say one adjective that could describe it is "amazing." Even more "amazing," however, is the true story in which the film (and now musical) is based on.
I would also like to mention that the stage production of PETER PAN traditionally (and effectively) uses an actor in a dog costume. Djdan's opinion is that it was off-putting in the show (s)he saw tonight. Why jump to the assumption that it is a "terrible" idea right off the bat?
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle