Lorenzo was a perfect host. He provided excellent and prompt communication throughout the whole booking and check-in process. The apartment itself was wonderful. Both clean and comfortable. The apartment is also very stylish and makes it enjoyable to hang out when not out and about in Trastevere. The apartment is above a lively trattoria on Piazza San Calisto which is a great location to access all that Trastevere has to offer. My wife and I travelled with our three daughters and there was ample room for us all. The two bedrooms are well insulated with double pane windows/shutters from the sounds of the night life in the Piazza; you did need to turn the A/C units on to make it comfortable with the windows closed, but this also helped drown out outside noise. One of our daughters slept in the common room on the sofa bed. The common room is not as insulated from the outside noise, it did effect her sleep somewhat, but not enough for her to sleep with her sisters in the second bedroom!
All in all, a terrific experience and highly recommended. We would (and may) stay there again some day. Enjoy!