I stayed only 3 days in Florence at Sara's apartment. The location is very convenient. I was able to dash by Boboli gardens twice in my short time there due to how close it is to the apartment. Everything is extremely walkable in Florence but you will appreciate being on the oltrano side of the river.
The bedroom window is the one with the view which looks out at the chruch and the square down below, with beautiful light in the morning and church bells. At night there is a lot of noise until quite late (groups of singing Italian youngsters). I enjoyed hearing life around me although I would have liked to keep the window open at night for fresh air. But the window is double glass and blocks out all the noise making it very quiet for a good sleep. The bed is firm and comfortable.
The main living area is a bit cave like and dim, with the low ceiling beams (you have to duck a lot). There is one small window looking onto the interior of the apartment building (no view). Both skylights open for cross ventalation.
I didn't cook but the kitchen appears to have everything you might need including dishwasher and washing mashine. There are good cafes and restaurants on the square. I picked up a delicious panini every morning (1/2 for breakfast and 1/2 for lunch to feed me on the go all day).
Bathroom is all new and very nice. Towels and sheets were also crisp and new. This made a big difference in my experience. The elevator is a big bonus!
I appreciated being able to book this at the very last minute and Sara helped me a lot by calling a taxi for me on my last day, which I really appreciated.