I loved my stay with Ksusha.
Firstly her apartment was clean, spacious and airy. The room was exactly as described.
Whilst her apartment is not right in the centre of town, as Florence is quite small, it was only about 20-25 minutes away by foot and there are public transport options too. I also found the area extremely safe too.
Ksusha herself was a fantastic host. Being a solo traveller it was nice to have her around, she really made me feel at home and was always there to provide some great advice. Her directions, recommendations and tips were indispensable!
In summary I would definitely stay with Kshusha again and I would recommend her apartment for anyone wishing to visit Florence.