Stay at Niccolo's apartment in August through the middle of summer. Although it has no AC it's not required, it has a fan and the open windows cool the apartment down asap.

Great location, near some amazing restaurants, close to everything. All in walking distances, my partner walked to everything while I had a cold unfortunately (not the apartments fault, 1 month of travellings fault) so the bed is very comfortable, I can vouch for that!!

Had a bit of problem getting to the apartment from the train station, its next to the church, need to leave the train station, its not one of the buses at the exit. Beside that, we had a great stay in Florence.