Flavia's place was a really great base for us during our 5 day stay in Rio. Its a short walk from a bunch of stuff in Copacabana and the metro, which is well located for getting around Rio. The kitchen is just about big enough for preparing very basic food, and there's even a little table to eat at :)
Flavia was really contactable before and throughout our stay and very quick to respond helpfully.
A great place if you're looking for a base to explore Rio.