The apartment is located at a perfect spot. You can see the Duomo when you walk out the door, and the statue of David is in the museum opposite to the flat. The street is crowded during the day, but really quiet at night. I slept with the window open.
The hosts are just the nicest, most helpful people ever! It was easy to chat with them using WhatsApp.
The room was beautiful and clean, and the bed comfortable and big enough for two (I slept alone, though). Even though there was no ac in the room, I slept well with a fan provided in the room. The shared bathroom was clean and there were some nice products (shampoo etc). I didn't use the kitchen but it seemed really nice.
I would definitely come back to this apartment!