We did not meet Nilo personally but he organised everything in a perfect way we had no problem. Nilo's apartment is a very nice and sunny, it is equipped with everything one might need for a good stay. It is in a relatively healthy state (wooden floor and wall paint are coming loose) but the apartment is very central in Copacabana - easily reachable by public transport (subway and buses), few blocks away from the beach, and in a very lively neighbourhood.
It is very recommendable.