Federico's apartment was fantastic, exactly as described. The location is very central, and all the fantastic attractions Florence has to offer were easily within walking distance. Just outside the apartment were a number of restaurants, cafes, ice-cream shops, a pharmacy and a supermarket. Federico was a pleasure to deal with, and I can gladly recommend him and his properties to anyone.
The only caveat I would have with the apartment is that access is up two flights of steep steps, and while this was no issue for me our my group, it is something to consider if travelling as, or with, a person with limited mobility.