My husband and I stayed in this apartment for one week. Everything was immaculately clean, fresh and organised. The location was very convenient (less than 5 min walk to Duomo).
The only issue was that some nights we could hear the noise from the streets. But that could easily be tackled by a using pair of earplugs.
Everything else was very nice. The host was a superb host. We had a lovely time in Milan. I would recommend this apartment for a couple or a 3 people max.