This rental is listed as a "cozy flat near the station". While the bathroom is very narrow, the kitchen is comfortably-sized, and both of the two bedrooms are VERY spacious. There is also a separate dining area and a roomy hallway between the two bedrooms. It had quite a bit more room than I expected from the description! The flat is approximately 0.5 miles/0.8km from the railway station. The route between the railway station and the unit is quite easy to navigate, but it is a fairly long walk. With regard to the one of the most popular Florence attractions, I was able to walk the 1.2 miles/1.95km from the flat to the main Duomo cathedral in about 22 minutes. The unit has air conditioners in the bedrooms and in the common space.
The host, Marialaura, is extremely helpful. She was ALWAYS accessible and helpful, both before and during our visit. I could not ask for a better host!
Note that this flat faces a busy road and intersections; as such, there is a fair amount of noise from the traffic and pedestrian signals. There are no coffee shops, bakeries, or restaurants close by. There is a shop which sells lunch/dinner halal kebab options two blocks away. The nearest grocery store is by the railway station. There are a number of restaurants close to the train station, and a few coffee shops along the way. There are also some pizzerias several blocks to the north of the flat (across the busy roads). The host provides a notebook with a thorough list of recommended restaurants, etc. in the city.
The host uses an electronic key system to simplify access to the apartment (the building door and the apartment door). This nominally requires that you have cellular service to enter the doors. I had been getting by in Italy using wifi only on my cell phone until this point and decided to buy a Italian sim card just before arriving in Florence so that I would be able to access the apartment without constantly pestering the host. Turns out I overcomplicated things - I could have used a physical key for the building entrance, then wifi from the flat itself when I got to the apartment front door.
Mind your toes in the bathroom - the beautiful black and white tile work makes it hard to see some of the raised obstructions in the narrow room. I jammed my toes once, and my teenaged travel companion tore one of his open on a corner in there. Nothing major, just a caution.