We were very pleased with our stay in Domus Livia at April 2015. The hotel is very clean and cozy and the staff is super friendly and helpful. Everything worked as expected, our late check-in was easy even without staff at present because we got good instructions by e-mail.
Breakfast was good (coffee, tea, cocoa, oj, bread rolls, toasts, sweet croissants) and we loved the fact we could enjoy it in the privacy of our room instead of crowded breakfast room.
Location of the hotel is great, it's a short walk from the Termini station and there's a metro and bus stops near, too.
In Via Nazionale there is few great restaurants and cafés even the hotel doesn't have its own restaurant. There's also a grocery store near the hotel.