Marina and her place worth every single positive reviews posted here.
The location is in the heart of Trastevere surrounded by very good restaurants and bars. There is a Tram/Bus stop just in a very short walk and this let you to the principals spots in Rome (Vatican: 10min, Colosseo: 10min, Piazza Venezia: 15min...).
The apartment is renewed and is exactly like the pictures with a good bed, great shower, quiet air conditioning and a very fast wifi. Even been in the street level is completely safe and very quiet.
About Marina she is a truly Golden Host. She stoked the fridge with juices, muffins, water and gave us good references os restaurants.
I couldn't imagine a better stay in Rome.