We stayed at Donatella's for a few nights.
We selected the apartment primarily because of its excellent location and because it's on the ground floor, so my wife would not have to climb stairs with an injured knee.
The location is fantastic - very central but on a very quiet street. The "Fiorentian decor" apparent in the pictures might be a tad too kitschy for some guests.
Donatella was a great host - very informative and extremely responsive. The apartment is decent sized with a nice sized bedroom and lots of wardrobe and drawer space. Shower is tiny (as is the case in most Italian apartments) but is easy to get into and the water pressure and temperature was very good.
Since the apartment is on the ground floor and we could not open the back windows due to some ongoing construction), the apartment is not very airy and does not get much natural light. We were not too bothered by that, because we were out during the day.