We stayed in Rome for four days and this was our oasis from the exhausting city. The hotel is a convent run by Polish nuns who may or may not speak English. If you want to immerse yourself in Rome without the insulation of big, touristy places, stay here. The hotel itself is in a very Roman neighborhood, four or five blocks from the Termini Station. We looked for the steeples of the Santa Maria Maggiore Church to find our way there.
Once you find the church, pass directly across the square in front, and you will cross a busy street with an information booth directly across. From there, the hotel is up the hill behind the booth. It has no sign, only the number 9. It is on the Via del Olmata, so make sure you're on that street.
We had to be buzzed into the place, and got room 32, which was very spacious. It also had three twin beds, which we requested. Breakfast was a very hard loaf of bread with butter and jelly. That's it. We also had a choice of coffee, or hot or cold milk (not so cold). However, we could live with the breakfast for the price, size, and cleanliness of the room. We also really liked the rooftop terrace. We ate all our evening meals there, and had a great view of the Coliseum, Victor Emmanuel Monument, and even St. Paul's in the distance. There is an SMA grocery store across the square from the Santa Maria Maggiore church, and we bought picnic supplies there.
I would recommend this place if you don't mind the bare necessities. We felt safe there, and we loved practicing our Italian on the nuns at the check-in desk.