Mercedes was very quick to reply to emails prior to arrival and kindly let us check earlier than the official check in time.
She was very welcoming and helpful during our stay.
The flat is very comfortable and clean, and in a great location for nearby bars, restaurants, and the beach.
Certainly one of the highlights were great facilities in the building: breakfast with a great view from the rooftop, a rooftop pool, and a hot tub/sauna/steam room.
Overall a fantastic stay. I would definitely stay here again if I go back to Rio.