You really can't beat the location of this Airbnb. It's super close to the train station and just a 10-15 min. walk to all the main attractions in Florence. Greta let us leave our luggage before and after our check-in, but be aware it's a 10-euro charge each time. So that added 20 euros to our stay.
Overall, the space is really nice and offers a lot of room. There's no AC, but that didn't bother us because it was September and cool outside. The bathrooms weren't the cleanest, but they were clean enough. There is a sewer line that feeds out to the patio, so if you open the windows and doors, you might let in a bad stench. Again, not a big issue because we didn't need to let in cool air.
If you're looking for a quick stay and want to stay close to the train station, this is a great spot.