Nice, clean airconditioned appartment, large enough for 4 grown-up's. Television with about 200 (Italian) channels, good kitchen with equipment. The balcony is also a very nice place to spent time.
It's a quiet neighbourhood, not very much tourists, felt quite save, with a small and large 'alimentary' (supermarket) two blocks away and a delicious ice-cream shop just around the corner.
The subway is a few minutes walk, which will take you within 10 minutes to the Colosseum e.g. One tip: the San Paolo basilic is on walking distance (800 meters) and should not be missed in your visit to Rome.
The communication with Constanza was very good, almost immediate answer when we had questions.
Had a very nice time.