(+++) Relatively large room + large bathroom. Clean and has everything you need for a short stay.
AMAZING location: 5-7 minutes from the train station and metro. If you like to walk, you can reach many of Rome's sights in 15-30 min. There are restaurants, cafes and shops around the apartment. the host was friendly and helped us with any questions. The price was good!
(--) The bedroom has two single mattresses so you "fall" in the middle.
The room is located in an apartment with two other rooms and we had no luck with the roommates - every night and morning they were banging doors and shouting, making a lot of noise...:(
Not a big problem but: the room has one window that looks out onto a patio where restaurant hoods work - smells like a kitchen. Can only be ventilated in the morning.