The flat itself is very nice, the location is great (you will appreciate how close it is to the Train hub and Subway station at the same time), its spacious and some shops and a local food market are in the area. Patrizia was extremely nice, caring and helpful, being one of the nicest host's I've encountered yet.
The are only two specifics to keep in mind: the flat gets relatively cold in the morning, as the automatic heating switches off at night, to heat up the flat again during the day. So if you are easily frozen expect fresh mornings :) The second is water heater limitations - it is totally fine, but if you are used to waste a lot of hot water (showers and baths), then you will have to get used to some time-outs this system gives you.
Otherwise its one of the nicest places to stay in Rome, great for romantic vacations!