Me and my girlfriend stayed 4 nights in Alessandra's apartment and it was amazing! The apartment is wonderful and everything works. The air conditioner works really well, which was really important for us to have a good stay in the apartment. Furthermore, the apartment is really well located, close to the main tourist attractions.
Alessandra is a lovely person and really helpful. It was easy to contact her whenever we needed. Therefore, if you are going to stay in Florence I definitely recommend Alessandra's apartment