She is wonderfull, and one of the most prominent Brazilian pianists and teachers.
She had a lot of character, style, and rhythmic energy, and her Spanish stuff IMO, is equal to none.
I love her Schumann fis moll Sonata.
Be carefull with judgement though--a lot of her recordings were made when she was pretty old and out of shape.
Still, when she was "ON", she was marvelous.