This apartment is perfect for 10 adults for one night. If I were in Florence longer I would only recommend it for 8 people unless there were small children.
Coming from the airport, find out exactly which stop you choose to get off at, definitely don't get off in front of the main train station. There may even be a better option - be sure to check with the host again.
If you want to spend more time in the apartment, the kitchen is sparsely equipped in terms of glasses (there are only plastic cups or coffee mugs), but also kitchen utensils.
That would be expandable. You would have to ask the host perhaps, whether there is still an upgrade in this regard with the equipment. We were only one night, left early in the morning, so that was no problem, because we had the evening before the many wonderful surrounding pubs in focus.
The handover was simple and quick, leaving without any problems, as we just pulled the door shut behind us and left the keys at the table.
It was a wonderful night in Florence, with lots of fun, tangible tradition and elegance, and a really delightful, clean, exceptional accommodation that surprised not only with an enchanted little city garden :-)