Eugenia's place is very nice! The location is excellent, only a few feet away from top of the Piazza di Spagna. This is the center but it is very nice and quiet at night. Very walkable but also there is a taxi lineup nearby. A couple of small markets/convenient stores down the street too.
The place itself is very nice with high ceiling and huge windows with plenty of light and patio doors/balcony. There is also an elevator to access the place.