Valeria's appartement is a little gem in Rome! It is spacious, super clean, very nicely located (especially if you need to catch an early train / flight). We visited everything on foot, except the journey to the Vatican.
Valeria went the extra mile sending us additional info about our early journeys to two different airports, and she recommended us some fantastic restaurants. In addition, she has been particularly quick at replying to each of my questions and very flexible with our time of arrival and departure.
The flat was better than expected (although the description was pretty exact) because she had thought about many caring details: slippers, shower cap, tea and coffee, soap for the washing machine, ...
We stayed 5 nights with my brother and, although we have found the area a bit noisy at night(metro, crazy seagulls, building work, drunk tourists on Friday night), it wasn't too bad and we slept very well. You should just be aware of it if you are a light sleeper who likes sleeping with an open window.
We will definitely come back!