Do not bother looking at other apartments in Florence. Book this now and you will not regret it. I showed pictures of the view from the terrace to a few locals and even their eyes popped at the amazing view of the Duomo.
Location is fantastic - next to the Duomo on a quiet side street, close to the market and the train station. The apartment itself is fairly appointed. If you plan on cooking note that there is not an oven. Plenty of space for our family of three and a family friend. Two full bathrooms with showers was a find in Florence no doubt. AC works like a champ. But again, none of this is really important since you will be spending all your time on the terrace staring at the Dumo.