The hosts, Annalisa & Leonardo, were very friendly and responsive and provided a welcome gift and lots of useful tips on where to eat (we tried Zaza and Fuoco Matto and they were incredible). Check-in was contactless and very straightforward.
The location is fantastic - 7-8 minutes' walk from the central train station and a very short walk from some of Florence's main attractions. It's a busy area with lots of restaurants and street sellers, so I would recommend bringing ear plugs if you are a light sleeper.
The apartment was very stylish, clean, and equipped with basic necessities (shampoo, conditioner, hairdryer, kitchen equipment, etc.). The shutters and blinds are blackout at night so there is no light to affect your sleep. The apartment is suited to a singleton or couple as it's on the smaller side -- the ceiling in the bedroom in the mezzanine is quite low so mind your head.
Would recommend.