The only problem I experienced was getting into the building, as the buzzer either did not work, or no one was available to answer it. Besides that, the stay was perfect. Very clean, two blocks from Roma Termini train station, and comfortable bed. Note: if you want air conditioning in the room, you must pay 7 Euros for each night. In the summer it is worth it, so you should have some Euros available for this.
There is a tiny elevator (only fits one person with luggage), which is a blessing because the rooms are on the top floor, about 5 flights up.
The family is very nice, although only their daughter speaks English. I would absolutely stay here again!