Celine apartment is wonderful: located few steps from the Duomo yet quite as many have already said. It’s very comfortable for two people and I guess perfect for a family of four. I loved the bathroom, bright and airy with the two windows, one of them with the view on the stunning Cupola of San Lorenzo Church that can be seen from the kitchen too, as well as while lying in bed, amazingly even in the dark of the night. The apartment is spotless and the communication with the host was prompt and pleasant.
The only two down sides for me were the mattress, which is too soft for my taste and the blankets that are synthetic and tend to warm up the body too much during the night. Overall a great experience!