I recommend staying at Rossana's place!
Rossana is a nice lady and offered a goood experience to my wife and me in our stay in Rome. The bedroom was clean and comfortable, there were two bathrooms available for us, a kitchen and washing machine for clothes. Rossana was flexible about checkin time , which was pretty nice for us. She doesn't live in the house, and there are in total four bedrooms that she rents for guests. All the guests we met there were very nice people and our 4 day stay was very good!
The only bad aspects are the fact that you have to take stairs to the third floor and there is a noisy bar right under the bedroom window.