The flat was very nice, and easy to reach by a metro and/or a bus. And it is not quite far from Navigli, which was a nice thing. There were other people, too but to be honest I didn't see them much so there is possible to have the own privacy.
Davide was great. If I needed something or had something to ask, he was always helping. He gave a lot of info about the transport, places to visit etc. So if you don't know what to do, where to eat... he gives good advices.
I stayed less than a week but sure would've been glad to stay even longer if I needed to.