My wife and I stayed here as part of our first trip to Italy, and had a great time at this apartment. It is just as beautiful as it looks in the pictures. There are charming details like the book pages for wallpaper in the living room, and the stylishly decorated bedroom.
The terrace is the reason to book this place, and it doesn't disappoint. Totally private with a spectacular view of the Duomo, looming like a benevolent Death Star. We spent many hours out here, with coffee and pastries in the morning (prepared in the functional kitchen) and a bottle of wine in the evening. There is an umbrella you can unwind for shade during the day.
My only minor complaint is that the air conditioning really only reaches the living room, so during the very hot June we were there a box fan or something might have been nice to help sleep at night. But others might not mind, and it was more than worth it in any case. And host Ada was courteous and responsive throughout. Overall, highly recommended.