We really enjoyed staying at the apartment. There was 5 of us and we all had a great time.
All the furniture and the facilities are new and comfortable; everything was clean. Overall the apartment is very well equipped (lots of utensils in the kitchen, air-conditioning, washing-machine, bed-sheets, towels, some basic toiletries, condiments in the kitchen...). There's even an elevator to bring the luggage to the 3rd floor if needed.
We were very well received, Stefano explained all the details in clear English.
The area is very lively in the evening (full of restaurants and bars) but the apartment is quiet if all windows are closed. The major sights are reachable on foot.
I totally recommend it if you want to visit Rome on a relatively low budget.