We liked the apartment a lot and we are very happy to stay there. It is one room apartment, but has 4 beds. We were there 4 guys with their road bikes and bike cases and we managed to fit there without any problems (bikes were on the balcony, bike cases under beds).
Our host prepared very large, very informative brochure with tourist information on the area and Milan itself (including grocery shopping, transportation, restaurants, places worth visiting, etc). There was a welcome basket with snacks and coffee machine with coffee cartridges - great thing for people coming to apartment after long journey.
Also apartment is equipped with everything needed to stay there for long time, like washing machine, iron, pots, hang-dryer, hair drier, TV, pots, etc - we didn't use it but it's there.
Apartment's location is great - few minutes walk from Grand Train Station and only few minutes more walk from Piazza del Duomo.
I definitely recommend the place.