Christina was a wonderful host. Our train came in late evening and she was there to greet us and explain the house facilities and even recommend eating places in the area - we did eat at several of those restaurants - specifically the Pesceteria and Punch and Judy. The apartment was indeed quite spacious and comfortable for the four of us.
The apartment has a nice view of the Arno river and is a nice 15-20 min walk along the Arno from downtown Firenze but the Arno makes the experience pleasant. The Tramvia station closeby makes access to Firenze SMN train station easy - we made trips to Chianti and Siena. The open air market on Tuesday just across the river was a highlight.
Overall, we enjoyed staying at Christina's and highly recommend staying here..