This is a gem! We were met at the property by Bernardo, who showed us all of the facilities of the apartment. It was easy to communicate with him via WhatsApp. The apartment is up on the third floor, so you do need to be able to climb a few flights of stairs. It was very clean and tidy, with central heating and air conditioning, so equipped for cold or warm weather. We had the latter, luckily! The bathroom was clean and the shower is hot and powerful. The bed is comfortable and there was lots of storage/hanging space for clothes. There was also a washing line outside for drying towels.
The location of the apartment is fantastic. It is just next to the large market, where there is an upstairs "street food" area, which is open from 8am - midnight every day (except Christmas Day!). There are lots of restaurants, bars and shops nearby. For breakfast I'd recommend "MO' SI caffetteria alla vecchia maniera", just two minutes around the corner - excellent coffee and food :) The apartment is around 10-15 minutes' walk from Piazza del Duomo. It is around a 10 minute (easy) walk from the central railway station.
All in all, an amazing place - thank you!