This is a very comfortable apartment right next to the Duomo! We met the owner and had a good introduction to the clean apartment which had air conditioning. This was very much appreciated as it was 30++ during our whole stay.
It took us about 20 minutes to walk to from the station (with a 4 yr old so slow pace) and it was located in a lovely old building on a small piazza. You step straight into Italy 's history when you go outside onto the small, cobblestone paved little allyways. Shops, restaurants and musea/palazzios a plenty and within walking distance.
Tip: do not line up for the duomo at 10 am as very long line, we got in much quicker later in the arvo.