I stayed in Alberto's flat for one month when I first arrived in Zurich. The flat is exactly as described and it was perfectly clean. I have also used the shared laundry room and did not have any problems.
Alberto has always been super responsive.
As others have mentioned, the flat is in the very centre of Zurich and the area can be noisy in the evenings (and there are bells ringing nearby). It did not cause issues to me, but it's good to keep in mind if you are a light sleeper.