Plus:
location is very central, close to the subway, shops, restaurants and the beach.
The building is safe.
Shower is good.
Negative:
the apartment was not clean and furniture run down.
Its quite noisy from the street even its going to the back but Copacabana is very busy and the buses very loud.
I stayed there 1 month and just liked the convenient location.
But I wouldn't stay there again.
It might be ok for 2 or 3 nights but not for longer.
Adam was friendly and nice but he is not the owner of the apartment.