We really enjoyed our stay in Niccolo's place. It is a very stylish apartment, in a great location. The San Ferdiano neighbourhood has several cool shops, restaurants and bars, at a whole range of budgets. All major tourist attractions are within a 20min walk, within the old part of town. We got to the house from Florence SMN train station, on the bus quite easily too.
Niccolo was also very helpful and quickly responded to our questions and requests.