The host was extremely friendly and efficient in communication. Although there was a last minute timing change in check-in time, I was notified in advance and their relative checked me in, who was also very courteous and personable.
The apartment's location was superb as it was away from the troves of tourists and Firenze is a small walkable city anyway so getting to the sights was easy. Also, we enjoyed the local bakery and open air market where we could get some food items for breakfast and snacks easily; and of very high quality.
The apartment is very quiet and residential. I would only suggest that you bring mosquito repellent or use the plug-in (blue disk thingies) repellent.
The host, at check-in, recommended what seemed to be some exceptional local, authentic restaurants, but we weren't able to experience them without advance reservations. We ended up having dinner at Trattoria Sant Angelo around the corner, which was very busy, but had really good food.
Overall, I would highly recommend this place and the hosts were great!