We stayed in 3 AirBnb's in Italy and England during our vacation and this was, by far, our favorite. Their were 6 in our group and we were all very comfortable. The apartment was spacious and very clean and modern. Each group of 2 had their own bathroom which made it easy to get ready in the morning - we weren't having to share space.
We picked this location because of its proximity to the train station. You're literally right in front of the station. We were able to drop off our bags and then immediately start sight-seeing, after our Aperol Spritz, of course. Also important - we were never bothered by noise from the busy train station.
We were only in Florence for a few days, so we didn't do any cooking in the apartment. The kitchen was well stocked though in case you plan to prepare your own meals. We did use the washing machine and it worked well. There's no dryer, but a drying rack was provided.
We would definitely stay in this apartment again on a future trip to Florence.