This is the most amazing place to stay in Florence -- you should book it immediately!
Aside from being a mere block from the Duomo and close to nearly everything you may want to see, the interior is absolutely gorgeous and the rooftop patio is to die for. It was clean, comfortable (with upstairs and downstairs A/C units), and spacious. This was the best place we stayed on our trip around Italy, and I could not recommend more highly!