I stayed in Cecilia's apartment for three nights, as I was visiting Florence to visit the EUI, which is just outside of Florence (Fiesole). For this reason, the location of the apartment was perfect; several bus lines left literally a few steps from the apartment to the EUI, as well as the centre and the train station, but also walking there was feasible. Walking to the centre (Piazza San Marco), took me about 15-20 minutes. A supermarket (Coop) very nearby was also very convenient.
The apartment is located in a more residential area, just by the river with amazing views. Although a bit outside the city centre, the area itself has a lot to offer (bars, restaurants, etc.). I would definitely recommend others choosing this location over the city centre as a pleasant alternative - more local, less touristic, offering a real 'Florence-feeling', providing everything you need.
The apartment itself is pretty much as depicted in the pictures; pretty much - as I personally think the apartment looks better than in the pictures. It was astonishing clean, and equipped with all the facilities one would desire for both a long or short term stay in Florence. The cozy patio/garden and the very comfortable big bed were two of my favourite aspects of the apartment. And as can be expected from Florence itself, there of course are some mosquitos - however, the apartment came with two electric scents that worked perfectly - I haven't been stung by any mosquito my three nights there.
Other than that, Cecilia was a wonderful host. She allowed me to check-in a bit earlier, and check-out later so I could go directly from the apartment to catch my flight back home, which I greatly appreciated as on the day of check-out I wasn't feeling well. Communication was fast, easy and friendly - as a host there really isn't anything more I'd expect.