Fantastic. Mature themes, fleshed-out characters with extremely complex personalities and unbelievably intricate arcs.
I made the mistake of judging a book by its cover and avoided watching this ingenious creation because I thought it would be childish and all 'rainbow and flowers', but I am not ashamed to say that I was completely and utterly wrong. Sure, this show is appropriate for kids, but there is a deeper meaning to everything that happens in this show. It's just phenomenal.