We just stayed here for a week in August and absolutely loved it, a true 5-star stay. If you're seeking a luxurious 2-bedroom in prime location near the Ponte Vecchio, stop looking--you found it. The location is within a 15-minute walk to everywhere we wanted to be in Florence, yet still quiet. This unit is the top two floors of a medeval tower, totally air conditioned and renovated. The kitchen/living area and patio is top level and the bedrooms are on the first level. The building has a 2-man sized elevator. The host is local and was amazing with check-in, quick to answer our questions, and even offered to make reservations for us at her favorite restaurants around town. The kitchen has the basic hardware to cook meals and store food, but the plethora of amazing places to dine had us out every night. There is a washer, no dryer, but our clothes dried quickly on the patio. There was a crib provided with the most comfortable crib mattress I've ever found.
You will want to get a taxi to/from the train station (10 min) or airport (25 min) unless you travel very light. One thing to be aware of: there is no rail on the stairs inside the apartment, so keep that in mind if you have young children.