Beautiful, spacious apartment with INCREDIBLE views. The pictures do not do it justice. Yes, it's a five floor walk up, but if you're up for it, the views make it worth it. Isa and Paola were super communicative and approachable. Location is perfect.
One thing- if you're a light sleeper, bring ear plugs. Duomo square tends to be quite noisy. It's the one downside of being in such a central location. I'm a crazy light sleeper, though. Ear plugs and melatonin helped a great deal. :)
Overall, couldn't have asked for a better place to stay in Firenze.