This is a great place to stay for a Rome visit! We (2 adults) stayed in Federico's apartment for over two weeks and found it to be in a great location, very clean, well stocked and Federico's responses were always quick.
You can't beat to location. It was centrally located to everything in Rome. It was in a relatively quiet area but we could walk 15 minutes and be at the Vatican or walk 3 minutes to a taxi or bus. Really great and easily accessible location.
The apartment was very nice. Federico met us and explained everything. There were things we haven't had at a lot of other Airbnb's like: a welcome basket, bottle of wine, pasta and sauce, paper towels, toilet paper, laundry detergent. You know those things you normally have to get as soon as you arrive. You can tell he took time to think about the arriving guests comfort knowing they'll likely be tired from travelling. The kitchen is smaller but this is Rome so it's to be expected.
Lastly, the check-in and all communication was super simply.