Apartment is really great, espacially the terrace. The bathroom with view on san pietro is stunning. Trastevere is a really good place to stay.
The only problem was the communication. I sent a SMS to ask about wifi with no reply. Someone not speaking english very well received us so it wasn't possible to discuss about the things to do in the area. Worse, we asked for a taxi service to the airport at 4:30 AM and he wasn't there. Hopefully there was a taxi in the street (good option actually because it is only 30€ the ciampino airport even at night).
But all this is just detail, we highly recommand this place !