Juarez's apartment is not cheap, but it is large and has everything you need for a longer stay, including a good washing machine.
It is centrally located in Leblon near a major intersection, offers fast, reliable internet, simple and uncomplicated check-in via the 24-hour porters (except on Sundays).
The cleanliness (e.g. kitchen pots) and the sealing of the windows on windy and colder days in Rio could possibly be improved.
The best thing about the apartment is the large, sun-drenched balcony on the 4th floor.
Thank you Juarez, Olia and Joerg