This place is a great launch pad for a few days in Rome. The Trastevere is a prime spot to stay for dining and casual night life, and is basically in between the two major sightseeing areas (Colosseum/Trevi area and the Vatican).
The balcony of the apartment is definitely the highlight-perfect for a morning coffee or evening glass of wine.
Downsides are the bathroom/kitchen spaces. Shower experience isn't great. Additionally, I am 6'2" and had to duck to get in and out of the kitchen so the apartment doesn't really do well if you're trying to relax indoors. Visitors with mobility issues should be warned of the 70+ marble steps up and down. (The marble stairs can be very slippery, especially after that glass of wine of the balcony I was talking about before!)
Fabrizio is very responsive and helpful to any questions you might have about Rome or transportation. We took advantage of the private car from FCO and would recommend to others as well.
All in all, giving this place 5 stars for value, location, and service. Thanks again for the service focused experience!