We had a lovely stay at Ava and Gustavo's! Good internet for working and watching TV. The kitchen was well equipped with everything you could need for cooking from home. Great laundry area and washing machine, including extra linens and towels for longer stays. Bedroom is situated in the back of the apartment with AC, so it's cool and quiet at night. We enjoyed the patio in the evenings, but felt hot downstairs during the daytime in the summer. Most importantly, the building felt safe with friendly 24/7 security and keyless entry to the apartment.
The neighborhood has lots of great little restaurants, pharmacies, and grocery stores all within walking distance. Great walking path nearby on the Aterro do Flamengo, too. It's centrally located between two metro stops - Largo do Machado and Flamengo for easy access around town.