We enjoyed a long (6 night) stay in this property. It feels like a cool piece of history, although seems to have been very recently remodeled. We appreciated that it was very clean with central air conditioning (very loud!! but kept it cool), though note it's tucked back in a building so felt a little dark. Location is pretty perfect for exploring Florence; we liked being on the Oltrano side of the river, but as Florence is small, easy walking distance to all the sites we wanted to see.
There were a few deviations from the listing that we'd note for future guests. The property was not really self check-in; we had to meet with someone who let us in and provided keys. The code never worked for us at the front door from the street, but fortunately the key did.
If you're not familiar with Florence's numbering system, note that each street has two sets of numbers: one for commercial properties (often in red and/or indicated with #/r) and one for residential. Google Maps originally sent us to the commercial property with the number, instead of the residential, and the individual we communicated with over WhatsApp wasn't the most helpful as we tried to figure out where we were going/if we had been duped.
We've offered the property a list of other suggestions to help with guests--our assumption is that this is a recently remodeled property, newly added to rental market, and that they own or manage other apartments/be converting other apartments in the building? There were just some basics missing, like a written guide/booklet to the property (such as a wifi password, check-out instructions, and basics for using the appliances), salt and pepper in the kitchen, etc.