Alessandro (Papa Carlo's son) was a perfect host and provided us with very clear and thorough instructions/advices before our arrival. The flat is modern, spacious, very clean and comfy with all the utilities you can expect. The location is just perfect to enjoy Rome as you can walk from here to every point of interest in the city. There is also a lot of nice restaurants/pubs just a few meters away so you don't have to travel a lot to spend some good time around.
I fully recommend Alessandro's place if you visit Rome for the first time!