I stayed at Stefano's place for a few days. The room was really comfortable and clean. Stefano and his girlfriend have been really great hosts. Breakfast was served every morning on a nice terrace with lots of different plants around. Great way to start the day!
The apartment is located very close to a metro stop and it's not far from the Vatican Museums. It's possible to walk there, although taking the metro is much faster.
I really had a pleasant time there.