We stayed here for 10 nights and would recommend this apartment if you want to stay away from the touristy area but close to fantastic restaurants and bars in Trastevere. The bustle and charm of Trastevere is either a short walk or a 1 minute tram ride up the road. The city centre is a bus ride away (to reach The Colosseum etc)
We were looked after by Federico's staff during our stay and Tommaso was very helpful. We had our laundry done during the stay and it was also flawless.
Communication was mostly great through air BnB messages. If you have an Italian SIM card it may be easier for you but the staff are generally around for the most part.
The apartment was clean and tidy and spacious. We were just the two of us but you could easily have 4 staying in the apartment if needed as there is a sofa bed in the living room.There were also ample kitchen supplies if you wish to use the kitchen during your stay.
One tip: if you have any mobility issues the apartment is situated high up on a hill and can be a fair hike to get up to the apartment! (Otherwise this helps to walk off all the gelato and pasta!).