Carlo's place is every bit as nice as it says on the site, perhaps even nicer. Everything was impeccably clean, including all the items in the kitchen. We used both the main bed and the sofa bed and both are very comfortable. Carlo used to live in the apartment himself and built many of the cabinets and shelves and it feels very personal and welcoming. The fact that he left some of the book there made it feel even homier. There's a kindergarten across the street and the kids can be noisy but we didn't mind. The location is on top of hill in a residential area, about a 15minute walk from Trastevere. It seemed far when we first arrived but once we figured out the route, it was really nothing much at all. Overall, a fantastic place that I can wholeheartedly recommend.