The apartment is fantastic and also offers a lot of space. As our flight arrived in the early morning (around 8 am) we were way to early for the 2 pm check-in but we still were able to store our luggage in the apartment while it was cleaned for us. When we arrived there to put our luggage in the apartment we were welcomed by Marco's brother, who also provided us with a map of Rome on which he marked the most important sights in the city and also noted down how to best get there. He also provided us with a list of great restaurants in the area.
The area the apartment is located in is probably the best thing about it. It is not directly in the center of the city but you can get there in 10 - 15 minutes. Thanks to this it is not crowded with tourist but you really feel as if you are living in Rome because you are surrounded by locals.
Another great thing about the area is the huge range of authentic and cheap restaurants.
The apartment itself is spacious and nicely furnished. The only (minor) problems we encounter was the bathroom door the got stuck a few times as well as a (sometimes) leaky coffee machine, but those were minor things and didn't detract from the overall experience.
All in all a great apartment in a fantastic area and very helpful hosts. Can 100% recommend it!