Lorenzo's apartment was perfect for our stay in Florence. It was stylish, functional and located very close to the train station. I would recommend it to anyone.
Note: although this wasn't enough to lower my review, please be aware that the apartment is up 3 flights of stairs and may be a tough climb for some. Especially if you have your luggage on the first day. I am an active 40 year old man so it didn't bother me much, but my mother struggled a bit walking up the stairs multiple times a day for 4 days.
Also, the keesy service he uses doesn't accommodate very large suitcases so we had to walk all the way back to the train station to check our bags after arriving early.