We are a family with three teenagers, stayed in Marzia's flat for 5 nights and we had a great time!
Absolut central location in the heart of Trastevere, surrounded by lots of good restaurants (we like 'Pasta e Vino' a lot!), bars and shops, but still quiet at night. Very tastefully decorated (the pictures are completely accurate), fully equipped kitchen, very cool slim dining table (great for breakfast or a glass of wine should it be too chilly on the terrazza). The latter of course is the biggest point of attraction, with stunning 360° views of the roofs of Trastevere up to the Vatican.
The two bedrooms are of adequate size for a holiday, both with clean and well-functioning ensuite bathrooms. If someone is sleeping on the couch in the living room, he/she needs to pass through one of the bedrooms to use the bath - hence close relationship recommended.
Easy communication with host, very friendly welcome by staff.
In summary 100% recommended, hope to come back any time soon.