My wife and I stayed in this wonderful Fontana di Trevi apartment for 5 nights.
The apartment was exactly as it shown in the pictures. Everything in the apartment was clean and nice, you get what you see.
Francesca was very helpful to arrange the airport transfers to and from the apartment. We could not open the safe box and Francesca helped us out by providing a master key, provided the master key. Francesca gave us a list of recommended restaurants which was very helpful.
The location is really good - right in the middle of the old city - we walked to all attractions, did not have to use public transportation or taxi (this is of course if you are willing to walk and see everything). Be aware of a pretty steep and narrow staircase leading to the apartment (if you need to carry your luggage).
We highly recommend this place to everybody who visit Rome.