Dalva is a great host though she can't speak English. We managed to communicate with Google translate. She waited for me downstairs on my arrival, walked with me to supermarket and also Metro station, so i can be familiar with the surroundings.
This studio is on a major street but room faces courtyard, hence no traffic noise at all, ensuring good nite sleep.
As with other streets in Copacabana, do expect some homeless around the area but never on the front door of this apartment which has security guard. There is a bicycle rental stand right in front of apartment on the street.