We loved our 5 nights in the apartment. Roberto showed up immediately upon arrival to let us in and show us around. Much of the original beauty has been maintained - floor tile, sections of original ceiling frescos, beautiful door/window framing. The very high ceilings. And good A/C. It was cool enough in the evenings that we just used the fan. It’s really lovely and very comfortable. It’s only a few blocks away from the duomo and there are great restaurants around the corner. The kitchen was great for doing a little home cooking too. And be sure to go across the street to Bar Curtis for great coffee, granita, brioche, etc.
I recommend forming a relationship with a taxi driver early in your stay if you don’t have a car. Get their card so you can schedule a ride in advance. They are very hard to find when you need one. Roberto also knows drivers.