I was in Rafaelle's apartment for Carnaval and had a good experience. The apartment is quite small but cozy and creatively decorated. Ideal for a couple but a bit tight for more people than that. Urca is a gem - close enough from most things you will want to do in Rio but without the mess and violence of other neighborhoods. it is a charming area, where an impression of the old Rio still survives.
The host was very attentive and left notes with the basics about the apartment and the neighborhood. Wifi works great as well as all appliances. Price was fair to what I got in return, considering the high prices practiced in Rio.