My family has stayed in Maria Elisa's apartment in April. We absolutely loved the apartment! It is very spacious, beautifully decorated and super clean. The beds (queen size in master bedroom, and two single in the second bedroom) were very comfortable. There is even a laundry room with a working washer/dryer. The roof deck is really nice, with gorgeous views, and has table and chairs, where we were able to have a lovely dinner. There is WiFi available in the apartment. The location is superb - steps away from Duomo. The street is quite loud, but it did't bother us when we closed the windows. The walk to the train station is about 10 minutes.
Maria Elisa was a very welcoming host, meeting us and providing all necessary info.
We would love to stay at this apartment next time we are in Florence.