Black Orpheus won an Oscar as the Best Foreign Language Film, beating among others the excellent German film, The Bridge. It had a big impact internationally, offering the first glimpse for many of the colorful brilliance of Carnaval and the enticing sound of bossa nova.
But since its release there have been criticisms, particular within Brazil, of the stereotypical presentation of Brazilian life. In Black Orpheus, people are dedicated to singing, dancing, and fucking. The favelas are romanticized ... life itself is romanticized. It's appealing, until you think about it too closely.
And the story, which transplants the legend of Orpheus and Eurydice onto Carnaval, is twisted too hard in order for it to make room for the legend. Things happen very quickly ... Orfeu is engaged to Mira, meets Eurydice, they fall in love almost instantly, spend the night together, and then Eurydice dies the next day.
The film might work better without the ties to Greek mythology, but it still remains a colorful but untrustworthy outsider's look at the culture of Brazil at the time.