I cannot recommend this stay highly enough! It is the perfect location - a 2 minute walk and you are in the heart of Trastevere, with all the best restaurants and bars at your fingertips! A 20 min walk over the beautiful Tiber river to the big sites (Pantheon, Trevi Fountain etc) and ~30 mins to the Vatican - so great access to the sites of Rome without feeling like you're staying in a "touristy" area.
The actual apartment itself is perfect. We had three guests (couple + a friend) and it fit us comfortably. The kitchen is incredibly well stocked (not that we did cooking at home with so many great places to eat nearby!). The view from the rooftop is stunning and honestly just icing on the cake to a great stay!