While the main appeal of this place is certainly its proximity to the Ponte Vecchio and other popular tourist attractions, don't expect more than a decent place to spend overnight. As the listing makes evident, it is not much more than a singular bedroom with a corner kitchenette and a modern-looking bathroom. Absolutely nothing wrong with that, but just know that the price is mainly justified by its location and even then it could be considered on the higher end of the scale.
We found the apartment itself clean, while the house itself seems to be in a slight state of disrepair, as evidenced amongst other things by some flaky ceilings and walls (e.g. staircase and bathroom) and, at the time of our stay, a non-functioning elevator.
The night's rest was adequate, the bed was a little hard for our taste and the ambient noise from the street and the staircase not extreme but still a bit displeasing.
All-in-all a 3.5 star stay which I'll generously round up to 4 for the communicative host.