Really clean and cosy apartment perfect for exploring the city. Kitchen sizeable enough to cook in (we did once fine). We walked everywhere within 20-30 mins - doubt you can beat it for location.
Communication from Carmen was excellent throughout. We didn't get chance to have the free breakfast but ate dinner at the restaurant once and it was very good. Her colleagues there helped arrange travel back to the airport and were also extremely friendly.
It was ocassionally loud at night with people coming in and out/walking around in the above flat, no other reviewers seem to have mentioned this so perhaps we were just unlucky.
Overall it was a great place to stay to explore Rome, thanks Carmen!