We had a wonderful stay at Tommaso + Arcadio's place nearby Piazza Santo Spirito. It's about a 20 minute walk from the train station (~20euro taxi). Tommaso couldn't meet us up so he had Lorenzo meet us and he was friendly and answered all of our questions.
The place was spacious and clean and as described. The only thing we wish we could change was that there wasn't any air conditioning (AC) to escape the summer heat, but that was our fault for not checking before booking.
Overall everything was great! We had a fantastic time in Florence. Tommaso also helped us book a Taxi to the train station at the time of checkout which was really nice as well.