We were 6 adults coming for a long weekend vacation in Rome. The apartment is huge and comfortable. Four of the five rooms are very spacious and nice. One room is in a different section of the house, significantly smaller, with no storage space and close to the kitchen. The apartment has big entrance and corridor, nice large living room, dinner room with a large table and an extra room with little use, except for watching TV.
The building itself has an old elevator - which is quite an experience in itself. Just note that it has some tendency to get stuck, so not to use it in night time.
The area around the apartment is quite central, with a supermarket, a gym and a restaurant in a short walking distance. Spanish stairs are 10 minutes walk.