The director, Guillermo del Toro, is the same guy that did Hellboy and Blade II. I've been a fan of his, however, since The Devil's Backbone, which Pan is sort of a sequel too (exploring aspects of the Spanish Civil War through a lense of fantastical horror.) Based on the other film, I have high expectations for Pan.
I still need to see his other acclaimed film, Chronos, which is suppose to be a non-vampire vampire movie.