We stayed here for 5 nights in december. The apartment is very large, very comfortable, with all amenities you could want.
Many pluses here - great host, making his best for us to have a good time, with no stress, possibility to park on the private spot for an extra fee, situated near the very modern and hip zone of Navigli (many good restaurants and bars, where young milanese go), but on a quiet side street.
Cant think of any downside. The only problem was due to the municipality of Milan, as the heat turns low everynight (take this into consideration when travelling in Milan during winter).
If ever back in Milan will stay here again, and this says it all!