Staying at Cristina's apartment near the Duomo was a great experience. She was very helpful from the very beginning - helped us with our luggage, explained us everything in the apartment and even tried to help book a cab for our way back to the station. I would definitely try to stay at her apartment again in future. The location and the interior of apartment was very nice and modern. It is very convenient to pretty much anything a tourist wants to do in Florence. 5 stars!