A very nice apartment in a quiet neighbourhood. Our host Patrizia was very helpful, providing us with helpful information and answering our messages quickly each time.
The apartment is recently and tastefully renovated, and has every commodity you need, including steam iron and cooking and dining utensils if you don't want to go out to eat.
It's not very close to the touristic area, but it has access to subway and bus in walking range, also some restaurants, market and cafe nearby. The taxi from the colloseum at night tariff was 20 euros. We went out late at night and the streets seemed very safe. The only minus was checkout at 10 AM and the fact that one window in the second bedroom wasn't closing very tight and let some noise in.

Overall, it was a very pleasant stay and I would recommend it to anyone.