I recently spent a week in the lovely apartment in Via del Scala. The apartment is 5-10min walk from the train station, and well positioned within 30min walk of all the major historical attractions.
The area was easy to navigate, and I felt safe walking around as a solo female traveler.
There are restaurants, shops and supermarkets for your food essentials nearby.
The apartment is comfortable, with a very comfortable bed, and windows that overlook an inner courtyard, not the street, so there is very little noise at night which is great.
There is a waterfall shower, and a full kitchen including a washing machine.
The apartment is on the first floor, with a lift for heavy bags; the Wifi and heating also worked well.
Communication from Anna and Judith before and during the visit was excellent.
I would highly recommend this apartment.