The room is a good size, simple but very clean, on the fourth floor (if I was counting correctly) of an old palazzo in the very centre of the old city. There is no elevator, so be prepared to haul your suitcase all the way up - not bad exercise before a pizza though! It is on a very busy, narrow lane but because the apartment is not directly on the street, I found I could not hear the street noise.
The neighborhood is very busy and touristy, but also at the heart of many of the oldest and most historic churches, including the cathedral and the Church and cloister complex of Santa Chiara (each about 10 minutes walk in different directions). One potential problem if you have lots of luggage or aren’t very mobile is getting a taxi to or from the apartment, because of the narrow, busy streets. I either walked everywhere or walked down to a busier street a couple of blocks away if I wanted a taxi.
Communication from the host was prompt and accurate and helpful. They even stored my large suitcase for me on the last day, after I checked out and wanted to wander around for a few hours.
Overall it was a relatively cheap, clean, and convenient place to stay.