My partner and I stayed at Apartment Oscar for a month while we worked remotely and explored Firenze. The apartment was perfect and spacious, had excellent wifi, a beautiful back yard, and was perfectly located - in a great neighborhood and a close walk to Santa Maria Novella (train station) and central Firenze. The neighborhood was tucked away from the busy tourist streets and had great restaurants, cafes, and bars nearby.
Paola and Roberto were wonderful hosts, very communicative/responsive, and helped us get our permesso and all other documents signed and registered with local police (needed for stays over 30 days). All of this to say - staying at Apartment Oscar was a wonderful experience, and we will be sure to come back.