We had a lovely stay at Fiorenzo's. Communication was great. We didn't meet Fiorenzo personally but his friend checked us in and out and it all went very smoothly. The apartment is much more spacious than the pictures suggest. We stayed there with four adults and one baby and had plenty of space. There are two large bedrooms, a good size living room and a dining room. The two bathrooms (one with shoer, one with shower and bath tub) are also large and modern. Everything was clean.
The apartment is located very close to public transport (the tram that goes directly to the Duomo/city center leaves from just around the corner). You can also stroll to the Navigli area in about 15-20min (or take the bus from just outside). There are restaurants, supermarkets and bars/cafes in the immediate neighbourhood of the apartment.
We would recommend Fiorenzo's place to friends and we would also stay there again.