We enjoyed our stay in this apartment, and we would stay here again. This is a very stylish apartment -- the rooms are large, and we were comfortable. It is a good climb up the stairs to the fourth floor, but this was not a problem for us.
The location is absolutely unbeatable. You are steps from the Uffizi Gallery. You are looking at the Palazzo Vecchio tower as you eat breakfast. All of the other major tourist attractions are easily walkable.
Oh yes, Alessio's trattoria, Antico Fattore (on the first floor) is excellent. Make a reservation.