Great place, large room, great location (walk 20m and you see the main cathedral). The only thing I didn't like, and this is probably an issue in all of Italy: my passport was photographed by an android device, and wasn't allowed to hide details apart from my photo. This is not ok: first of all, docnr should be ok to hide, secondly it is certainly not ok to store this kind of data on an android smartphone or send this using some kind of messaging service to someone else.
Hopefully the host will improve routines for such senitive and I hope AirBNB makes some good guidelines for this.