This is an excellent, well-located apartment to stay during your time in Florence! Within 10 minutes walking distance of basically all of the major attractions in Florence without being right in the middle of super touristy stuff, this apartment offers a perfect balance of feeling like a local without having to go too far to appreciate the major sights.
Modestino is a very responsive host and he offers tons of great local suggestions and support during your time in the city. He leaves behind the business cards for lots of fantastic local restaurants and is super generous and available.
The apartment itself is also quite comfortable with a spacious kitchen and sleeping area. Bear in mind that the apartment is pretty close to a street adjacent to a busy piazza, so things can get a little noisy at night, but my husband and I found some of the street noise well worth it for the proximity to great things in the city (plus, we're not super sensitive to sound).
We would definitely recommend staying with Modestino at this lovely Florence apartment in the future!