I stayed in the flat for two weeks in February 2017. I arrived one day late (due to some problems with my flight) and Júlia and Bruno were very flexible and helpful.
The bedroom is very spacious, with a double bed, a desk, a wardrobe, two shelves, air conditioning and a ceiling fan. Then there is a small kitchen, a small lounge and a small bathroom. The hobs and washing machine are quite new.
The building is located in a very quiet and safe street (opposite a police a station); it is very close to the restaurants in Gávea.
The bath and the shower are a bit old; in order to have hot water one needs to throw a burning match into a very old boiler which is placed over the bath - so this is not too ideal (nonetheless, depending on the weather, the hot water is not strictly needed).
The kitchen cupboards are a bit old; the tools (pots, pans and cutlery) are quite old: so not extremely good for a long stay, but ok for a short one.
So, although the weak points of the kitchen and the shower, I think that the price for renting this flat is pretty ok.