Nice, clean apartment in a quiet and safe part ot Florence. Relatively close to Campo di Marte. Buses 11 and 17 (5 min walk from the apartment) go to piazza San Marco, which is practically in downtown. Just have in mind there is only one supermarket in the area (closes 21:30) and not too many restaurants.
The host - Susy - is kind, helpful and informative. Ask her for directions to Badiani - the best ice cream place in town! :)