I enjoyed staying in this apartment. It is very clean and well equipped, with wash machine, hair dryer, a good shower, and a comfy bed. it is also well ventilated, with several windows in both sides of the apartment, and has A/C for the hot weather.
The two flights of stairs are wide, so it's not a problem to bring up the luggage.
Trastevere is a very lively neighborhood, with several bars right below the apartment. I had no issue to sleep after closing the windows, but I'm no light sleeper.