My wife and I are extremely happy with our stay at Federico's flat. Most impressive was his responsiveness to our needs. He was very quick to reply and provide any help.
The flat was clean and conveniently located about 10-15 min walk from Roma Termini station and just a few blocks from various bus stops.
In a safe area. Free espresso and cookies a plus. Wifi was available (though a bit slow - but still works).
This was our first visit to Roma and we would definitely stay with Federico again! I highly recommend staying here!