Sayd is very reactive and helped us to extend our stay even though the Airbnb built in translator made things a little challenging.
The flat is really clean, big and comfortable (the view is great too). Very good Internet connection.
The property is on top of the hill and there is only one bus neaby to go to town which comes once an hour -- so be prepared to either rely on taxis or climb up!
We had a lovely stay and recommend Sayd as a host if you come to Rio!