The only thing to improve a little bit is soundproofing, though it is a usual and understandabissue in historic buildings.
The location of the B&B is perfect - in a quiet street, just a stone's throw from the main attractions in the historic centre. However, the street itself is about 10 minutes away from the spots of 'maximum tourist concentration', so it's quiet and relaxing at night.
The B&B is converted from a former large apartment in a historic building, with high ceilings, large windows, and airy spaces. The most striking feature of the place is its design - very personal, artsy, a little bit quirky but pleasant. Each room has its own colour scheme and unique features (mine, Anna room, had a warm yellow tone and a huge antique wardrobe). Bathrooms have new fittings and are prisitinely clean.
Breakfast is substabtial, with much more choice options than average Italian accomodations. Everything is fresh, and the croissants are baked literally before your eyes.
The staff was very nice and helpful, gave me lots of advice on local restaurants, places of interest etc.