First, Marina cares and is available for any question anytime; she prepared for us stuff in the refrigerator and everything was clean and in order - we were four, so sets of towels in 4 different colors were waiting for us. We asked and Marina arranged for us a van shuttle from the airport to the apartment, which was punctual and at a very reasonable price. Second, the suite itself is very nice, well equipped with everything you may need and the location is 3min walk from the tram or 5min walk to restaurants and fun area of Trastevere - while the street the suite is located at, is a small one and quiet.
The only think to consider for future improvement, is that the sofa in the main room (which opens to a bed) for the kids, isn't as comfortable as the bed in the bedroom - but it isn't worse then what you get in most hotels, though.
Finally, worthwhile mentioning that we lost in the apartment a necklace and Marina bothered to search it and advised us that it had been found!
If and when we come to Rome again, we have no doubts where to stay :-)