Casa Zeffiro is a nice home which was not well adapted to our specific circumstances. The pros are:
-location, literally 5 min away from Fontana di Trevi
-nice flat and building
-efficient communication with the host (the flat is managed by an agency)
The cons:
-we traveled at the end of December and the flat temperature was set to 16 degrees. We kept on trying to raise the temperature (our son is an infant and kept on coughing and sneezing), but barely managed to reach 20 degrees. There was no way to override the heating settings.
-there was a water leak from the shower as the doors did not close firmly. Every shower resulted in a significant spill of water
-although this is clearly mentioned, there are some extra costs linked to renting the flat. In our case, it amounted to 100€+++