Rocco's appartment is very nice : very modern, spacious, very central (10minutes walking to Duomo), very clean and in a very secure residence (3 doors to open before the appartment)
There is no Wifi but you can easily connect to the youth hostel's network from the window, which is just under the appartment.
There is no climatisation, which was sometimes a problem for us and overall in August when it's hot in Milan. As the appartment is not much oriented to the sun, climatisation is not essential but would be needed.
Rocco is a very nice host and we were really pleased to stay in his appartment !