Fantasy is not everybody's cup of tea. But, you know, if you take any literary form, nobody reads everything. And no literary form has a hundred percent following. I think that's a splendid book. It's all very subjective.
Taste is totally subjective, even among editors and professional people in the publishing field.
Other people see it as kid literature. I stopped reading fantasy for a long time but picked it up again about eight years ago, and was astonished at how the bar had been raised. Magazines like The Magazine of Fantasy and Science Fiction publish literary quality stories. Your still have people writing old-school hack and slash. You also have people like Connie Willis and Charles de Lint who are blowing the genre right out of the water by mixing it in with modern-day setting and mythic themes.