My parents and I spent a week in Rom for my mother's birthday and all had a great time meeting Lorenzo and his family. He is a very generous host, someone who loves to meet new people and welcomes you into his own home like a friend. Our highlight was having a traditional Italian dinner with his family!
The apartment itself is very tastefully and practically furnished with some interesting books and nice details. It is smaller than the impression we got from the pictures though, but for a couple and one single person who don't necessarily need wide beds it is comfortable enough. The one-person bedroom wall doesn't connect fully to the ceiling, so if you are concerned about sound carrying between that bedroom and the living room this is not for you.
The apartment is located on the basement level. Thanks to some attractive glass ceilings there is enough light, but there is no window in the bathroom or bedrooms, so the only fresh air comes from a fan in the bathroom and from the large living room windows.
The location is excellent, a quiet residential area close to excellent restaurants in a non-touristy neighbourhood - Lorenzo will give you many recommendations! - and to public transport and the city centre. Overall, I would definitely recommend staying here!