The apartment is definetely recommended for its wonderful location. Just a few minutes of walking distance from Mercato Centrale which is open until midnight, also very near (5 min. walk) to train statin which makes arrival and departure super-easy. We did not use any public transport during our stay, walked everywhere although it was rainy mostly. There are markets, shops, bakeries, bars and restaurants very nearby, and it is lively through the night.
The place is not large, but well arranged and has everything needed. It is exactly as in the pictures: no surprises.. Apartment was perfectly clean and warm.
We could not meet Niccolo in person but his friend Simone was at the train station at the scheduled time to pick us. He was friendly and helpful. They were both available to contact via WhatsApp, phone or text.
There were two minor downsides: 1.The bed is made by two single matresses, not actually a double bed. It was also a bit noisy. 2. The water in shower drains a bit slow. Both did not bother us too much, so overall we were happy with our experience. If we visit Florence again, we would like to stay here again.