We had a lovely week in Maria Carla's apartment. It's much bigger than it looks on the pictures, and everything (kitchen, bathroom etc) is new, shiny and functioning properly. It is right in the middle of Trastevere, so you will hear street noises from the restaurants and musicians, but it is not unpleasant, and if you close the window the noise is much much less. Location is perfect; you can walk everywhere, and there are some nice restaurants nearby if you take the effort to walk a bit away from the tourist streets. Wifi is working perfect as well. Maria Carla is very friendly and left some tips for restaurants etc and a free bottle of wine!