Me and my friend stayed at Nicola's place for 4 days and the whole stay was really good. The location is awesome: 10 minutes walk to Duomo, 25-30 minutes walk to Navigli canals with lots of restaurants, lots of shops around. The place was clean and quite modern, the whole communication with the host was very smooth (Nicola replied to all my messages right away).
Loved it there and would definitely stay again when in Milan!