Frederico’s place was perfect for our four nights stay. It has a single bedroom with AC. a sofa bed in the living room if needed. The kitchen has everything to cook, from pan to olive oil and even pasta.
It is 15mn walk from the Vatican and 20mn to downtown. You can also take the train from the station (2mn walk) to get to Ostiense (1€) and the blue line (metro).
We had a great stay there and Frederico was very kind. He helped us a lot before and during our stay.
I highly recommend his place.