It’s a one bedroom apartment one block from the cathedral on the second floor (third US floor). There is an elevator but you need to go up a two sets of stairs to reach it. Check-in is in person but the host met us right on time. The apartment was clean, internet works great. Seems to have all amenities you want. Bed and bedding are older. The shower does work (trick is to tilt up the knob that looks like it should turn or pull out). There was a barking dog in a neighboring apartment our first night but not any night after. The duomo went off at 7am one day.
Overall, a very good option for a couple on vacation. The top reason to stay here is the location. It might not be a good place for remote work or for a family with kids.