We've enjoyed our stay in Giovanni's appartement. The parking garage is very convenient and although it's in the ztl zone Giovanni arranged the ztl fee (10 euro) every time for us. So it's was hassle free for us. He's also very easy to communicate with. But must of al the location is great! There is a small supermarket just 30m from the appartement and it's a 7min walk to the city center. Would definitely recommend it when staying in Firenze!