Giovanna's place is fantastically located. It is 2 minutes walk from the Uffizi and the Ponte Vecchio and everything else which you want to see is also walking distance.
The whole place was spotless and the shared bathroom wasn't an issue. Giovanna is fine with you coming and going as you please without feeling in the way and the both your room and the building are securely locked.
Breakfast was great with beautiful pastries each morning, as well as other usual options.
She was also kind enough to let me keep my bag there after checking out.
The only things I would note is that it is up plenty of stairs. It is on the second floor, but these are old buildings with high ceilings. Be aware that there is no lift. In addition, the shower isn't mounted but is handheld. It takes some getting used to and I'm not sure I'd manage for more than a couple of days.
However i wouldn't hesitate to return to Giovanna's if I return to Florence and highly recommend her place.