We had a great time at Annalisa & Leonardo's apartment. It's easy to find, right next to a great restaurant, the central market and a few minutes walk from the Duomo. The rest of the main attractions in Florence are also close by. The train station is ~10 minutes away by foot.
The apartment is very cosy, situated on the last floor, it had all the appliances we needed. It's well-decorated and there was plenty of space.
It was very quiet, but a little chilly despite the air conditioning, so keep in mind if you visit during the winter.
Will visit again next time we are in Florence!