Nena is super nice and thoughtful. She responded very fast and gave us a very detailed introduction of the amenities of the apartment. During our stay, it rains a lot, she prepared umbrellas.
Speaking of the location, it is 5 to 20mins walk to everywhere you might want to visit in Florence. The neighbourhood is also very quiet and clean.
One tip to those who are travelling with friends, that if both of you want some privacy, it might not be good, since the two bedrooms are connecting.