Beatriz has been a great host. She greeted us at 6 AM on a Saturday, provided a fantastic array of yummy tropical fruit, loads of help and tips. When we had a power cut she and her husband immediately came to speak to us, providing candles and ensuring that the problem was going to be solved. The treehouse is lovely, it's beautifully located and the only small issue - the family of tiny monkeys that arrived to check on us at 7 AM every morning - was more a fun thing than a hassle.
I've been using AirBnb for a while now and I've never really felt more welcome than at Beatriz's. It's like being at a friend's house, I really couldn't recommend it more: it's clean, it's cheap, it's spacious (ideal for couples), it's different from any other flats in Rio, it's conveniently located... I can't really find a drawback.