It was my first experience with AirBnB and I didn't know what to expect but they made everything to make me feel like home.
The apartment is clean and safe, in an ideal place (2 blocks only from the Beach). WiFi works perfectly and the hosts are really kind and cook HUGE breakfasts. After that, you'll not be hungry before a long long time.
That's definitively a place I would recommend and, if I ever come back to Rio, that will be the place I'll try to book again. Not sure there is a better one.