This is a great place to stay in. The apartment is big and comfortable. There're two huge bedrooms and one living room which can also be used as another bedroom. It's very comfortable for a family of 4. There's a huge supermarket nearby, the Coop, you can pretty much find everything there. The apratment is decorated with taste. I think the place will be even a better place to stay in Spring and Summer, as one can then use the balcony and the garden.
The location is not far from the centre. We took the bus No.14, but there seems to be a problem with the stop Santa Catherina. The bus just never seems to stop there. So we reverted to bus No.2. With the Google map function, you can find everything location very easily.
Florence is a beautiful city. Leopoldini has a jewel of a place.