This is a super cool apartment. I stayed with my 18 year old daughter for 4 nights and used this place as a base. The location is not central Rome but we were amazed at how easy it was to get to places by walking (and we walked a lot!) or by tram. We never had to wait more than a few minutes for a tram ( €1.5) that took us in to the heart of the city, a few minutes from the Colosseum (and the main shopping area). It was approximately a 15 minute walk to the main Trastevere area where there were many bars an restaurants. The apartment is a short walk from the train station (on the regional train line from the airport -€8) and there is a supermarket on the main road. If you sleep with the windows open the tram/trains can be heard faintly but we slept soundly.
Roberto was a super host. He communicated well throughout the booking phase. A lady called Diletta met us on arrival, showed us around and answered all of the questions we had about the local area.
We would definitely use this apartment again.