Alessandra is a marvellous host, she was upfront from the beginning that she doesn't have internet or air conditioning but this was not a problem for us (she has several fans along the flat). She wasn't in the house on the dates we stayed in but was always in contact to help us and recommend places in the area. Also, she was really flexible and arranged everything to allow us to check in and check out when was more convenient for us.
The flat has plenty of personality. The room is big and has everything you need (closet, comfortable mattress, etc). The kitchen is well equipped if you want to cook and the bathroom is spacious. It is within walking distance from the Re di Roma metro station and has many buses nearby, so moving around is not a problem. Also, you can walk to Circo Massimo, Colosseum, and other things to see. If you fancy you can even walk to Trastevere (probably even the centre if you like to walk, it should be about 50 minutes). Finally, the building and area are very quiet so you can rest well at night, and is really picturesque.
The area is mostly residential, so you can sense the real Italian neighbourhood environment. There are a lot of pizzerias, rosticceria and supermarkets to buy groceries if you want, and some nice restaurants as well (that we didn't try). There is a gorgeous gelateria (Freddo 5 minutes from the flat that we totally recommend).