I have just come back from Rome, and stayed for 4 days at Giulio's apartment with my wife and 15 & 10 yrs old Boys. Excellent experience. Apartment was absolutely perfect for our needs. Nice, perfectly kept, very functional, clean. And considering the cool & funky location really quiet! You could not hear any noise from outside.
Giulio has been extremely useful and professional when we met to collect the keys, describe the main features of the place and arranging our transfer back to the airport.
Its location( ....and i am from Rome, even though i've been living in London for 20+ yrs) is just unbeatable. Period. Trastevere is the coolest, most charming area you can find in Rome...hence in the World! Walking distance from all the key places you want or must to see in that amazing city. And if you're tired of walking, you have a tram (number 8) station walking distance from the apartment that will take in less than 10 mins to either Piazza Venezia or Testaccio(other cool place where you want to go for a cool diner...).

All in all really happy with everything. Highly recommended.