We recently stayed at Fernando's Trevi Fountain "Saint Louise Suite". The apartment was perfect for my family. It was beautifully maintained, clean and very cosy. We loved living in a real Roman house the way real Romans do. The location was great, walking distance to everything you want. Via Flavia was a non-touristy street located with lots of local restaurants and cafés. It had if not THE BEST Gelati shop just on the corner!!
Best of all was our delightful host Fernando. He was very sweet, kind and generous. He gave us a thorough handover, he suggested to us where to go, eat, walking routes, sites to see and even provided us a lovely bowl of fresh Roman fruit to eat upon our arrival.
I would definitely recommend this apartment if you want an "authentic" Roman experience!!