We really enjoyed our stay in Firenze, Modestino and Eleonora really care and are very responsive. They have a very quirky checkin process that seems to be somewhat typical of older Italian apartments, but got us in the place none the less.
The apartment itself is exactly as described, large and very charming. Romantic really. We liked how much space there was, more than enough for the two of us. And the kitchen layout is great for small meals and prepping coffee in the morning. The area is perfect, not too many tourists but lots of stuff to see locally. Lots of shops and great food to eat. Santo Spiroto is primo.
The biggest con we found was the street, it's quite busy and pretty loud. We had trouble sleeping on the really busy nights so bring some ear plugs if you're a light sleeper.