I don't think it can be said enough: do not hesitate to book! Elisa is communicative, friendly, and has created a truly welcoming space. She doesn't just rest on the gorgeous view out of every window (which obviously didn't disappoint). This apartment is also tidy, well stocked, and thoughtfully decorated. It truly felt like my husband and I lived there - no hotel will ever compare.
Even though the apartment is literally across the street from Il Duomo, which gets a lot of foot traffic, we barely heard any noise from the street at bed time. Entrance to the apartment does involve going through a few locked doors and two small flights of stairs with a landing in between. Despite that, it didn't take a ton of time to get into the apartment and we knew it was secure. Not to mention, you really feel like you are going home to your "castle!"
Whenever we return to Florence, I will not even consider any other place. Really - if you are thinking about it, stop and book it now.