I am from Rio and I knew where the location was. Juliana and Joel's studio is located in a nice residential area in Copacabana. Just One block from the beach. you have plenty of options for your basic necessities: Just around the block you find, nice bakeries, restaurants, bars, pharmacies...
transportation is not a problem at all; the subway( 4.30 reais or 1 US dollar) is only a couple of blocks away, buses ( 3.95 or 0.95 US cents ) are another option in Rio.
Always when a called Joel he was very easy to be found. Very polite and prompt to help with whatever you needed.
From the studio, you can see the ocean ad some bars and restaurants across the street.there one called "Bossa Nova " that has live music during the weekend, nothing ever bothered me. If you are not from Rio, you should go at night to have some drinks and meet some beautiful and friendly people that stay​ on the sidewalk having a good time.
I highly recommend Juliana and Joel's studio.