The biggest plus was definitely the location - just around the corner from the Duomo and all the other sights. The check-in procedure was pretty straightforward as well. The place offers lots of equipment for cooking etc. We didn’t meet Martina in person but she always responded fairly quickly.
The biggest downside was hygiene. Our sheets and towels were covered in foreign hair, there was a thick layer of dust on most surfaces and the pipes in the bathroom were clocked which made washing your hands etc a very unenjoyable experience. The neighbours were pretty noisy as well, so if you value your sleep maybe not your best option.