Gaia's apartment is a great little place, very conveniently located: not right in the center of town, but very close to everything, especially the train station, Santa Maria Novella. We walked everywhere in very little time and had a quiet place to come back to. It's fairly quiet at night, as well; we only heard music from the square, and that stopped by 11pm. You are living right at Piazza Santa Maria Novella, but this apartment does not have windows looking into the square. That was fine for us, as we enjoyed being in the back part of the building. There really are 100 steps to the apartment door, something to keep in mind if exercise is not part of your vacation plan.
The kitchen area is very compact and new, with all you need for light cooking. The bathroom clean and nice, especially the shower with it's overhead rain fixture. Bedroom is spacious with a tiny balcony. The mattress on the queen size bed was not the most comfortable; a bit hard for us, but we are 60+, so that could have something to do with it!
WiFi worked very well.
(Something else to think about: mosquitos; we visited in early October and had them every night.)
Gaia met us when we arrived, she's a very friendly and welcoming person, gave us lots of tips about Florence and made us feel at home. Thanks again for a great stay!