I stayed in this apartment for about a month.
Pros
• Location location location. The Ponte Vecchio is less than 5 minutes away. Same for Piazza della Signoria, etc.
• Very fast internet.
• The host left a good selection of breakfast things (coffee capsules, jam, etc.). I didn't use them but it's a nice detail.
• Very kind host.
• Nice paintings and drawings hanging on the walls here and there.
• Some books (in Italian).
• Coffee machine with capsules.
• Good surface area.
• Traditional Florentine red tiles.
Cons
• Very dark, there is virtually no natural light getting into the apartment.
• Ceiling is fairly low.
• Loud ventilation system coming from outside, that turns on every few hours for several minutes.
• The bed is two single mattresses rather than one large one.
All in all, if you are here as a tourist and will be mostly outside, this place is perfect for you. If you're a nomad worker staying for a longer period, the fast internet is really good but the lack of natural light and low ceiling are down sides.