The flat (on the second floor) looked exactly like the pictures - the simple decor rendered a pleasant atmosphere and everything was very clean. Maria Luisa herself was not able to meet us at our arrival but had arranged for her father to do so, and we received a very cordial greeting along with some clarifications and the keys. With a 3-5 minute walk in either direction we could reach two bus stops. St. Peter's Basilica is only a little further walk away. The neighborhood was quiet and we could hear traffic only faintly.
The kitchenette had most of the basics for cooking and dining and the gas stove burned nicely; however, we would recommend to anyone serious about cooking most meals there to bring a small chef's knife and a few basic spices. (On a side note, we found meats would go bad quickly so we always bought it that day.)
Finding the place was a bit tricky since there are two intersecting named "Via Aurelia": thus, in retrospect we would have taken a taxi from the airport, especially considering we had checked luggage.
One caveat: there is no washer actually in the flat but a laundromat is just down the street and around the corner.
Overall, we could not have asked for a more suitable stay especially for the price and we have already recommended this to our friends and family. We always enjoyed coming "home"!