An excellent location, less than 10 minutes from Snata Maria Novella by tram, the stop is 2 minutes away. Also, a lovely little area about 2 or 3 hundredeeters away with shops, bakery, bar/restaurants if you don't fancy going into town.
Everyone we met was lovely and helpful from check-in to check-out. The apartment we had was on the top. Floor and had a tiny little terrace which was lovely for having coffee in the morning. The apartment was spacious, nicely laid out, plenty of wardrobe space, and the bed was big and comfy. Our son slept on the sofa bed which was also comfortable.
The only slight issue was that although there is a kitchen in the apartment, it is just a microwave, and if you want to cook at all (we made breakfast every day) it costs extra to get an induction hop plate and a couple of saucepans, but it costs very little really.