I recommend you this guesthouse/room.
The host is very welcoming and helpful.
The room with personal toilet and shower is very tidy and spacious.
The accommodation is located in the center of every touristic location. Most of the places are in walking distance or you can take the metro. The metro is a 3-minute walk from the guesthouse. This means you also get easy transportation to termini and the airport from there.
Perfect accommodation for short and long stays.