The host, Maria, is very friendly and helpful. She likes to laugh, at least it is what I could recognize during the few minutes of our meeting, and she is multilingual so that it is no problem to communicate with her at least in English. In any case she gives very helpful information about Rio de Janeiro and its touristic spots and how to get there always.
The apartment as such is perfectly located at two and half blocks from Copacabana beach, it is quiet and very safe there, at any time of the day... The apartment is small and cozy, but in any sense really perfect for one or two person / people. It features everything one needs for his stay in Rio. There are plenty of supermarkets, bars and restaurants in walking distance from it, on Thursdays there is even a market just in front of the building where one can buy what ever he needs. The kitchen does not feature any cooking stove, but in any case there is a microwave oven. There is even a wardrobe where one can store his luggage and its content.
I would highly recommend that stay to anyone.