During our Italy trip we stayed in Florence for five days and we LOVED Letizia's apartment! Her brother met us on arrival and was already waiting at the door, he carried my bag up and there are stairs but not too many! The apartment is beautiful and clean. There is a cute kitchen which opens to a living room (with TV although we didn't use it) and terrace. We spent some time on the terrace having wine and it was wonderful. There is an upstairs with a little nook/dressing area and then the bathroom and bedroom (also a TV). The bathroom was spacious and the shower was a good size compared to others I've seen in Italy. There is an AC unit in the living room and bedroom and the temperature was always comfortable.
Letizia was always available by message on the app and also gave her email. She has a binder with information in it which was very helpful. The wifi was easy to use and worked perfectly the whole time.
The area was by the Duomo, a very short walk! But even though it was so central it was actually very quiet at night and we slept well. We would stay here again in a heartbeat.
(reminder to have euro with you when you arrive, there is always a city tax no matter where you stay)