I stayed at Caterina's place for 2 weeks and felt very comfortable, safe and inspired. Loved the high ceiling and tall windows, the whites of the walls, it gives a sense of space and room to breathe; the apart is actually very big. Loved the details, the old pieces of furniture mixed with the new - very stylish, minimalistic, clean, yet Florentine.
The location is super good, you can easily reach all the attractions and are very close to Pitti Palace, Ponte Vecchio, Piaza Signoria, just everything really :) But still, you are nestled in Piazza della Passera that has a very local feel.
Caterina is very responsive and nice, no problems in communicating with her.