great film, but probably the most misrepresentative ad campaign i've ever seen for a movie. this is NOT a comedy. Christine Lahti's Sylvia is NOT a one dimensional free-spirit. she is disturbed, as is the entire family. this translates perfectly from the book, as does the film's look and emotional atmosphere.
as for the opinion that Sylvia is a Pied Piper, that's just wrong. she could care less if anyone follows in her path. it just so happens that her niece is seduced by virtue of what i would interpret as instinct. the family has a long history of breaking from the norm, much to its detriment. the niece is merely fulfilling her filial destiny.
to say that the story presents a polemic about nonconformity shortchanges the viewer from the complexity of emotions that it evokes. there is no argument. this is just the way things turn out for these folks. and in my opinion, the ending leaves us questioning, just as it does in the book, how much control we have over destiny.