The apartment is in a great location, one block from the beach and one block from a subway station. There are grocery stores nearby (Pão de Açucar, for instance), restaurants, and bars. The restaurant/bar across the street, 420, has excellent lunch options (prato-feito) for very reasonable prices. I recommend.
Gabriel was easy to contact, I had no problems entering the apartment. No problems with that.
My only issue was that the apartment was not very clean. It had been superficially cleaned before I arrived, for sure, but it could use a deeper cleaning.