A family of four, we stayed two nights at Paolo's. Before arriving, communication with Paolo was smooth and easy.
We were welcomed by the janitor, who speaks only italian but it was not really a problem since she is used to welcome guests. We saw Paolo later, only a few minutes, but he gave us a few information.
The accomodation is conveniently situated, not far from the metro and a 20 minutes walk from the "navigli", which are a great place to have a drink or diner.
The flat is in accordance with the ad on airbnb. The area is not really nice, but there's a supermaket across the road and you can park your car for free. It's above all a place to sleep, fairly clean (even if we saw a cockroach on our last day) and a good value for money.
On the whole, this is a place I will recommand for a cheap and quick stay in Milan.