The stay was absolutely lovely, the flat is nice and the room has a separate bathroom which is definitely a plus! :) the area is authentic and there is lots of things to do - the Colosseum and many other things are in walking distance (restaurants, Irish pubs, concert locations, etc.), from the centre around Piazza Navona it's about 30 minutes walking.
Sara was very nice and had many information about Rome, she also offers some guides which is very helpful!