We were very happy with our stay. The location is close to the train station, and walkable to several of Rome's cool sights. (And the host provided a helpful walking-tour guide starting from the apartment, so that was a great way to get started with exploring the city.) The unit is a nice size and felt very secure. It was quiet at night, despite the fact that there's a bar right across the street.
The bed is elevated, as pictured in the listing, above a walk-in closet so there's lots of storage. The stairs are a bit steep, and it's awkward for whomever is sleeping on the far side of the bed (if you need to climb over your partner to visit the toilet in the night). So this unit isn't for everyone, but if that isn't a concern for you, then you'll be very happy there.
Communication was great, very proactive.