Diana's apartment is lovely, modern and is located in a relatively quiet, yet central part of town. Pretty much anything you may want to visit is within walking distance. It was also fully equipped with basic necessities - salt, oil, toilet paper, laundry detergent... not that we cooked, but if you do you'll have pretty much everything you need. It features two AC units, which was fantastic as the temperatures in Florence were up to 40C throughout our stay
One word of caution: it's on the top floor, there is no lift and the stairwell is narrow and quite steep. Might be an issue if you are not in good shape, have a disability or come with heavy baggage.