The apartment is located in the old city center, very close to all the important historical sites (max 15 min walk). It is also conveniantly close to a well-stocked grocery store (200 m).
The aparment itself is wonderfully equipped, with a great kitchen/livingroom space, and a cozy bedroom in the basement- this makes the sleeping area significantly cooler than ambient outdoor temperatures (plus there's AC on top if you're still too warm, but we found it wasn't necessary to have it on all the time). Everything is clean, comfortable, and well maintained.
Raul himself is very welcoming- he quickly and helpfully responded to all of our questions.
We definitely recommend this apartment to anyone coming to Florence.