Donatella's apartment is wonderful, not only is it located right on the Plaza (which is the absolute sightseeing epicenter of Florence), but it is large, comfortable and well equipped.
Donatella was very helpful, she came down and fetched us right from the street and gently guided us through all the apartments amenities and the nearby attractions. The apartment is fully equipped with high speed internet, a comfortable sofa/double-bed in the living room (where my kids slept) a nice kitchen (microwave oven, coffee and sandwich maker, among others), a nice bathroom, a washing machine (which came in very useful as we had been traveling several days).
We had an absolutely excellent stay at this apartment and hope to be able to come back soon.