Sumiyo was a great host - always replied to messages very quickly and checked that we were happy during our stay. The location was perfect, less than five minutes to Ponte Vecchio and 10 minutes to Piazza della Signoria, but also close to the Piazzale Michelangelo on the same side of the river. The apartment was clean, the bathroom was very modern and the kitchen was well stocked with pans, plates, glasses, etc. Being an 400 year old building the feeling of history added an aspect to being in Florence that you wouldn't get staying in a hotel. The one thing I would note is that the street outside can be quite noisy at night, but I think this is common across the city and it didn't keep us awake. All in all, we enjoyed our stay and would definitely recommend staying at Sumiyo's apartment.