We are a couple (academics) from Amsterdam and stayed in Rossella's apartment for one week. Rossella answered our emails very quickly and cared very much about our comfortable stay in her house and in Rome as such. She gave us a lot of good advice (concerning restaurants and cafés), and there were a lot of fine things prepared for us (on the table and in the fridge).
The apartment is exactly as it is described: spacious (with two bedrooms) and aesthetically designed, located on the ground floor of a three-storeyed building in the style of the late 19th century, typical for the whole neighborhood (though parts of it have seen better times). And indeed the terrace which goes to the backyard is the place where one remains most of the time, at least during the summer. It's a very fine place.
The apartment is very close to a Metro station (Manzoni). And the neighborhood is quiet and safe.
We certainly would love to stay there again.