I and my friends were using this apartment during the marathon in Florence. It was really amazing. It is close to all sights in Florence, and of course, it was around the corner to the start and finish area. The apartment was clean and we had everything that is needed, even though we stayed only for one day.
The only thing that needs to be considered in advance when you are coming to Florence is parking, especially if your stay is in the heart of the city is parking. We were unprepared I must admit. But of course, managed to sort it.
Have a wonderful stay in Florence.