It's a nice flat turned into a B&B with 5 rooms and a common area. The host is nice and attentive. The location is great if you commute from/to Termini railway station or rent a car (for which most car rental company store the cars in a garage building couple streets down the accommodation), however, it's not a particularly nice area of Rome and takes some time to get to the centre by crossing less attractive neighbourhoods of the city.
The room is nice but the bathroom would benefit from a refurbishment. As the internal walls are fairly thin, sometimes you can hear the noise from the other guests.