It is a very good location near Piazza Navona. The entry is from a busy street but the flat faces the internal court and is very silent. The hot water and wi-fi are OK. The kitchen is rather small but well-stocked. The Check-in and Exit went smoothly and the communication with Silvia, the person taking care of the flat, was very good.
The only problem I can see is the stairs, the flat is located on the third floor, each floor of this old building is about 5 meters high, we are talking about a lot of stairs.