hidden gem, truly. Massimialiano is a wonderful host. We met him and gave us a lot of suggestions about the neighborhood. The apartment is located close to the Libia subway station (2 blocks) and 5 blocks away from the train statio called Roma Nomentana which you can take it to go directly to Fiumicino airport. In the Viale Libia street there are a lot buses to take you to the downtown in 15/20 minutes easily.
We loved the apartment and felt it like our own home. We used to had breakfast there and a couple of nights we cooked the dinner in the fully equipped kitchen [pizza, pasta, etc]. 5 stars!