The apartment is conveniently located in the Duomo area and is in walking distance to most of the city's attractions.
The apartment is a little small for four if you stay more than three or four nights, but the space is optimized.
It is clean except for a few marks on the walls and well-equipped. We didn't use the kitchen appliances except for the kettle and coffee machines.
All in all a good experience, but the Sweet Inn booking process needs to be reviewed (long and tedious).
The works mentioned in some previous comments were still going on when we were there (even though we were told otherwise) but the nuisance was acceptable because it was limited to daytime. If you spend most of your day visiting, you will barely notice them.